CN104266856B - Two grades of band cover free boundaries and radome fairing built-in boundary implementation in vibration tower - Google Patents

Abstract

The invention discloses a kind of two grades of band cover free boundaries and radome fairing built-in boundary implementation in vibration tower, the step that wherein two grades of band cover free boundaries are implemented includes: arranges and freely suspend frock and rocket body lifting hangs in radome fairing priority tower body docked with rocket body by radome fairing and determine that hanging basket installation site radome fairing separates the steps such as fixing hanging basket half basket；Radome fairing step of built-in boundary implementation in vibration tower includes: clamped frock and built-in boundary implement two big steps.The present invention compared to the prior art, have the test preparatory period short, effectively utilize existing resource, reduce experimentation cost, advantage that the most supporting risk processing scheme reduces empirical risk.

Description

The implementation method of the second-level free boundary with cover and the fixed support boundary of the fairing in the vibrating tower

Background technique

The structural dynamic characteristic test is a routine and important link in the product development process. The general purpose of the test is to assess the dynamic characteristic parameters of the structure in the real state of the product; for launch spacecraft and missile weapons, it can provide attitude control The important design parameters of the stable system can also provide important parameters for theoretical prediction model correction; it can also be used for structural health detection and discovery of structural design defects, etc. The boundary condition of the product is a decisive factor to determine the dynamic characteristic parameters of the structure. Therefore, how to realize the specific boundary conditions of the test product safely, efficiently and at low cost is an important link in the early planning and test implementation process of the structural dynamic characteristic test.

The related technologies for the free boundary conditions of conventional structures are quite mature, and rich experience has been accumulated. With the development of domestic related test technology, the existing technology has reached the advanced level of foreign related test technology. Especially for the large-scale beam model structural parts of vehicles and missile weapons, the classic vertical suspension method is used to simulate the free flight state of the product, and the technical experience is quite rich. At the same time, the horizontal suspension method simulates the free flight state of the product, and has also accumulated considerable technical experience.

Among them, the elastic simulation structure must ensure that the elastic frequency of the rigid body of the system and the first-order elastic frequency of the product meet the strength and stiffness requirements specified in the structural dynamic characteristics test specification, and different industries have different requirements for this. Take the strength and stiffness requirements specified in the "Code for Modal Tests of Missiles and Launch Vehicles" as an example. It is required that the ratio of the first-order elastic frequency of the product to the rigid body elastic frequency of the system be greater than 6.

The above are the basic technical index requirements of the product free suspension system. Due to the different product characteristics, the free suspension system will be designed according to the structural characteristics to meet the task requirements.

If the conventional product free suspension system design scheme is applied to the vertical suspension scheme design of a certain type of secondary hooded state in the vibrating tower and the design of a certain type of fairing fixed support scheme in the vibrating tower, there are the following problems:

(1) In the state of a certain model with a second-level cover, when the fairing is hoisted into the tower and docked with the second-level rocket body, the hanging basket part of the fairing spreader can no longer be lifted out of the vibrating tower, nor can it be lowered to the ground on the second floor of the vibrating tower. ; while the test state requires that the test piece does not contain the hanging basket state.

(2) In the fixed support state of a certain type of fairing, there are many explosive bolt devices and hinge devices below the fixed support plane in the required state of the test piece. How to facilitate its on-site installation and the implementation of the fixed support boundary, the design of the fixed support tooling is more difficult Big.

(3) In the fixed support state of a certain type of fairing, when the fairing is hoisted into the tower and placed on the second floor of the vibrating tower, the hanging basket part of the fairing spreader can no longer be lifted out of the vibrating tower, and the hanging basket part is here It is the main load-bearing structure. How to remove the fairing basket and implement the boundary state of fixed support.

Contents of the invention

The purpose of the present invention is to make up for the deficiencies of the prior art, and solve the technical problems faced in the implementation process of the second-level free boundary with a cover and the fairing in the fixed support boundary in the vibrating tower.

In order to achieve the above object, the technical solution of the present invention is a method for implementing the free boundary of the secondary band cover and the fixed support boundary of the fairing in the vibrating tower, the specific content is:

The steps for the second-level mask-free boundary implementation include:

Step 1: Set free suspension tooling; lower several free suspension tooling wire ropes symmetrically from the fifth floor of the vibrating tower, and a horizontal support frame is fixed at the end of the free suspension tooling wire ropes. suspension tooling;

Step 2: hoist the rocket body into the vibrating tower body, and let the docking surface at the end of the rocket body dock with the free suspension tooling; wrap the tape around the joint between the outer surface of the rocket body and the fairing, and then wrap the bag through the lateral protection device The belt is connected with the vibrating tower body;

Step 3: Use the fairing basket to hoist the fairing into the vibrating tower body;

Step 4: Connect the fairing and the rocket body to form a second-level shrouded rocket body;

Step 5: Determine that the suspension height of the fairing basket in the vibrating tower body is lower than the installation height of the fairing basket by 0.3m and the azimuth is rotated clockwise by about 10 degrees;

Step 6: Set the load-bearing beam on the fourth floor of the vibrating tower, use the load-bearing beam to install the load-bearing pull rope for hanging the fairing basket, and prepare the horizontal fixed pull rope for fixing the spinner basket, and the horizontal fixed pull rope One end is fixed on the vibrating tower body between the second floor F2 of the vibrating tower ground and the third floor of the vibrating tower ground;

Step 7: The fairing basket is separated from the fairing of the secondary rocket body with cover, and the fairing basket is divided into two baskets and half baskets;

Step 8: Suspend the half-basket of the hanging basket at the height determined in step 5 by using the load-bearing pull rope;

Step 9: Connect the half-basket of the hanging basket to the operating platform of the vibrating tower with the horizontal fixed rope, and fix the half-basket of the hanging basket at the position determined in step 5;

Step 10: Adjust the activity space between the half-basket of the hanging basket and the second-level hooded rocket body, the free suspension tooling wire rope, and the operating platform of the vibrating tower, so that the minimum distance is greater than 100mm;

The steps of the method for implementing the method for fixing the boundary of the fairing in the vibrating tower include:

Step 1: Fix the tooling;

Step 1.1: According to the distribution position and size of the protrusions at the butt joint surface of the fairing, the form of the butt joint surface and the distribution size of the butt hole, determine the circumference of the matching hole and the position of the through hole for avoiding the structural interference of the butt joint surface;

Step 1.2: According to the size of the space required for assembly and docking operation of the fairing test site, determine the size of the through hole used to avoid the structural interference of the docking surface;

Step 1.3: Determine the inner diameter and outer diameter of the tooling according to the distribution form of the ground rails on the ground on the second underground floor of the vibrating tower and the distance between the ground rails of 1m;

Step 1.4: On-site punching of fixed support tooling; on-site punching of fairings, which is relatively difficult to operate and takes a long time to implement. For this reason, the docking structure transfer frame of fairings is used in advance to install on the fixed support tooling. With butt threaded holes, it can effectively reduce the difficulty of implementation and shorten the test cycle;

Step 2: Fix Boundary Implementation

Step 2.1: Analyze the force state of the joint surface in the vertical support state of the fairing, and determine the height and distribution of the fairing pad and the fairing basket pad;

Step 2.2: The fairing is hoisted into the tower and is in an upright support state, and rubber pads of the same thickness are covered on the surface of the fairing cushion block and the fairing basket cushion block;

Step 2.3: Wrap the tape around the middle part of the fairing, and then connect the tape to the basement floor of the vibrating tower body through a lateral protection device;

Step 2.4: The fairing basket is separated from the fairing to form two half-baskets of the hanging basket, and the half-basket of the hanging basket is placed on the ground of the second floor underground of the vibrating tower body;

Step 2.5: Use fastening bolts to install the fairing end journal on the end journal joint of the fairing;

Step 2.6: Lift the fairing to a height of 500mm with a vibrating tower crane and slings;

Step 2.7: Remove the fairing block and the fairing basket block from the fixing tool, and place them on the ground of the second floor underground of the vibrating tower;

Step 2.8: The fairing is docked with the fixed support tooling;

Step 2.9: Fix the support tooling.

In the implementation method of the fixed support boundary of the fairing in the vibrating tower, the fairing pads and the fairing basket pads in step 2.1 are evenly distributed, and the height difference between the fairing pads and the fairing basket pads is the same as that of the rectification. The height difference between the lower end surface of the hood hanging basket and the butt surface of the fairing is the same, and the plane area of each block is not less than 200mm×200mm.

Compared with the prior art, the present invention has the advantages of short test preparation period, effective use of existing resources, reduced test cost, and at the same time, a matching risk treatment scheme reduces test risk.

Description of drawings

Figure 1 is a schematic diagram of the state transition of a certain type of secondary cover.

Figure 2 is a schematic diagram of the state of a certain model of the secondary covered state hanging basket after removal.

Fig. 3 is a schematic top view of the spinner basket after separation.

Figure 4 is a schematic diagram of the fixing support tooling of the fairing.

Figure 5 is a schematic diagram of the state where the fairing enters the tower and is placed on the fixing tool.

Fig. 6 is a schematic diagram of the state after the hanging basket is separated from the fairing.

In the figure, 1-vibrating tower body, 2-secondary rocket body with cover, 3-fairing basket, 4-free suspension tooling, 5-vibrating tower operating platform, 6-lateral protection device, 7-basket Half basket, 8-bearing beam, 9-load-bearing pull rope, 10-horizontal fixed pull rope, 11-fairing, 12-free suspension tooling wire rope, 13-tooling inner diameter, 14-tooling outer diameter, 15-fitting Hole circumference, 16- through hole, 17- tooling lifting point, 18- fairing pad, 19- fairing basket pad, 20- vibrating tower crane, 21- strap, 22- fairing end journal, F1～F6: the number of ground floors of the vibrating tower, F-1, F-2: the number of underground floors of the vibrating tower.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

A method for implementing a two-level free boundary with a cover and a fixed boundary in a vibrating tower with a fairing, including two aspects of free boundary implementation and fixed boundary implementation, the order of which is determined by the task, and the specific content is:

The steps for a second-level mask-free boundary include:

Step 1: Set the free suspension tooling 4; symmetrically lower several free suspension tooling wire ropes 12 from F5 on the fifth floor of the vibrating tower, the end of the free suspension tooling steel wire ropes 12 is fixed with a horizontal support frame, and the free suspension tooling steel wire ropes 12 Form the free suspension tooling 4 with the support frame, as shown in Figure 1 and Figure 3;

Step 2: hoist the rocket body into the vibrating tower body 1, and let the docking surface at the end of the rocket body dock with the free suspension tooling 4; wrap the tape around the joint between the outer surface of the rocket body and the fairing 11, and then pass the horizontal The protective device 6 connects the strap and the vibrating tower body 1 to keep the arrow body stable; as shown in Figure 1 and Figure 3;

Step 3: Use the fairing basket 3 to hoist the fairing 11 into the vibrating tower body 1, as shown in Figure 1;

Step 4: dock the fairing 11 with the rocket body to form the second-level shrouded rocket body 2, as shown in Figure 1;

Step 5: Considering the structural characteristics of the vibrating tower body 1 and the space occupied by the free suspension tooling wire rope 12, determine that the suspension height of the fairing basket 3 in the vibrating tower body 1 is lower than that of the fairing basket 3. Installation The height is 0.3m and the azimuth rotates about 10 degrees clockwise. When the rocket body and the fairing 11 are determined, the installation height of the fairing basket 3 is determined; as shown in Figure 2;

Step 6: Set the load-bearing beam 8 at F4 on the fourth floor of the vibrating tower, use the load-bearing beam 8 to install the load-bearing stay rope 9 for hanging the fairing basket 3, and prepare the horizontal fixed pulley for fixing the fairing basket 3 at the same time. Rope 10, one end of horizontally fixed stay rope 10 is fixed on the vibration tower body 1 between the second floor F2 of the vibration tower ground and the third floor F3 of the vibration tower ground, as shown in Figure 2;

Step 7: The fairing basket 3 is separated from the fairing 11 of the secondary rocket body 2 with cover, and the fairing basket 3 is divided into two half-baskets 7, as shown in Figure 2;

Step 8: Use the load-bearing stay rope 9 to suspend the half-basket 7 of the hanging basket at the height determined in Step 5, as shown in Figure 2;

Step 9: Connect the half-basket 7 of the hanging basket 7 to the operating platform 5 of the vibrating tower by using the horizontally fixed stay rope 10, and fix the half-basket 7 of the hanging basket 7 at the position determined in step 5, as shown in Figure 2;

Step 10: Adjust the activity space between the hanging basket half-basket 7 and the second-level hooded arrow body 2, the free suspension tooling wire rope 12, and the vibrating tower operating platform 5, so that the minimum distance is greater than 100mm, so as to avoid mutual contact and influence The test measurement results are shown in Figure 3.

The method of fixing the boundary of the fairing in the vibrating tower:

Step 1: Fix the tooling, this step is common knowledge, as shown in Figure 4;

Step 1.1: According to the distribution position and size of the protrusions at the docking surface of the fairing 11, the form of the docking surface and the distribution size of the docking holes, determine the circumference of the punching hole 15 and the position of the through hole 16 for avoiding the structural interference of the docking surface;

Step 1.2: According to the space size required for assembly and docking operation of the fairing 11 test site, determine the size of the through hole 16 for avoiding structural interference of the docking surface to be 370mm×350mm;

Step 1.3: Determine the inner diameter 13 of the tooling and the outer diameter 14 of the tooling according to the distribution of the ground rails on the ground of the second floor F-2 in the vibrating tower and the distance between the ground rails of 1m; in order to maximize the use of the ground rails, ensure the fixed support of the tooling Rigidity, determine that the inner diameter of the tooling 13 is 2.1m, and the outer diameter of the tooling 14 is 4.4m, which can ensure that the fixed tooling can be installed with 10 pressing devices to connect with the ground rail;

Step 1.4: Drill holes on site for fixing tooling; set 96 butt holes evenly distributed in the circumferential direction on the butt surface of fairing 11. If the butt holes are drilled in advance and then docked on site, it is easy to cause a large number of butt holes to fail to connect. Rigidity is difficult to guarantee, so in order to ensure smooth on-site docking of fairing 11 fixed support, it is determined that the fixed support tooling is equipped with butt joint holes on site, as shown in Figure 4;

Step 2: Fix Boundary Implementation

Step 2.1: Analyze the stress state of the joint surface in the vertical support state of the fairing 11, and determine the height and distribution of the fairing spacer 18 and the fairing basket spacer 19; after analysis, the fairing 11 is equipped with a fairing basket 3 state, under the condition of vertical support, the docking surface cannot be under concentrated stress for a long time, and at the same time, the fairing basket 3 cannot be under concentrated stress for a long time in this state. For this reason, the fairing 11 docking surface and the fairing The hanging baskets 3 are supported at the same time, and it is ensured that they are all in an approximately distributed stress state; it is finally determined that the fairing pads 18 and the fairing hanging basket pads 19 are evenly distributed, and the fairing pads 18 and the fairing hanging basket pads 19 are evenly distributed. The height difference is the same as the height difference between the lower end surface of the fairing basket and the butt surface of the fairing, and the plane area of each block is not less than 200mm×200mm, as shown in Figure 5;

Step 2.2: The fairing 11 is hoisted into the tower and is in an upright support state, and the contact surface protection measures between the fairing 11 and the fairing cushion block 18 and the fairing basket cushion block 19 are determined; in order to protect the fairing 11 and the fairing cushion block 18 With the contact surface of the fairing basket pad 19, the rubber pads of the same thickness are covered on the fairing pad 18 and the surface of the fairing basket pad 19, as shown in Figure 5;

Step 2.3: Wrap the middle part of the fairing 11 and wind the wrapping tape circumferentially, and then connect the wrapping tape to the underground floor F-1 of the vibrating tower through the horizontal protection device 6, as shown in Figure 5;

Step 2.4: The fairing basket 3 is separated from the fairing 11 to form two basket half-baskets 7, and the basket half-basket 7 is placed on the ground of F-2, the second underground floor of the vibrating tower, as shown in Figure 6;

Step 2.5: The worker installs the fairing end journal 22 on the end journal joint of the fairing 11 by using fastening bolts, see attached drawing 6;

Step 2.6: using the vibrating tower crane 20 and the sling 21 to lift the fairing 11 to a height of about 500mm;

Step 2.7: The staff removes the fairing cushion block 18 and the fairing basket cushion block 19 from the fixing tooling, and places them on the ground of F-2, the second underground floor of the vibrating tower;

Step 2.8: The fairing 11 is docked with the fixing tool;

Step 2.9: Fix the support tooling.

The implementation method of the above-mentioned fairing on the fixed support boundary in the vibrating tower, the design method of the fixed support tooling is suitable for the situation where there is structural interference between the test object and the fixed support plane and the relevant operations on the test object need to be carried out on site; the implementation of the fixed support boundary mainly considers the test object. Transition mode during safety protection and test state transition.

The above-mentioned general technical plan, the test site and the test object are not limited, but to meet the situation that the test object spreader enters the test site with the test object during the assembly process in the test site but cannot go out or put it down, the test object spreader The determination of the suspension scheme in the test site is different due to the structural changes of the test site and the test object, but the factors considered are not to interfere with the test object and the test boundary and to leave sufficient safe space for movement;

The embodiments of the present invention have been described in detail above. The above-mentioned implementation is only the best embodiment of the present invention, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge of those skilled in the art, it can also be Various changes can be made without departing from the spirit of the invention.

Claims (2)

1. A kind of two-stage belt cover free boundary and fairing implement method for fixed support boundary in vibrating tower, it is characterized in that comprising two-level band cover free boundary implementation and fairing implement two parts in vibrating tower fixed support boundary, specific content for: The steps for the second-level mask-free boundary implementation include: Step 1: Set free suspension tooling (4); lower several free suspension tooling wire ropes (12) symmetrically from the fifth floor (F5) of the vibrating tower, and fix horizontal supports at the ends of free suspension tooling wire ropes (12) Frame, free suspension frock wire rope (12) and support frame form free suspension frock (4); Step 2: hoist the rocket body into the vibrating tower body (1), and let the docking surface at the end of the rocket body dock with the free suspension tooling (4); wrap circumferentially at the joint between the outer surface of the rocket body and the fairing (11) Tape, then the strap is connected to the vibrating tower body (1) by a lateral protection device (6); Step 3: Hoist the fairing (11) into the vibration tower body (1) by using the fairing basket (3); Step 4: docking the fairing (11) with the rocket body to form a second-level shrouded rocket body (2); Step 5: Determine that the suspension height of the fairing basket (3) in the vibrating tower body (1) is lower than the installation height of the fairing basket (3) by 0.3m and the orientation is rotated clockwise by about 10 degrees; Step 6: Set the load-bearing beam (8) at the fourth floor (F4) of the vibrating tower, use the load-bearing beam (8) to install the load-bearing pull rope (9) for hanging the fairing basket (3), and prepare Fix the horizontally fixed stay rope (10) of the fairing hanging basket (3), and one end of the horizontally fixed stay rope (10) is fixed on the vibrating tower between the second floor (F2) of the vibrating tower ground and the third floor (F3) of the vibrating tower ground On the tower body (1); Step 7: The fairing hanging basket (3) is separated from the fairing (11) of the second-stage banded rocket body (2), and the fairing hanging basket (3) is divided into two hanging baskets and half-baskets (7); Step 8: Utilize the load-bearing stay rope (9) to suspend the half-basket (7) of the hanging basket at the height determined in step 5; Step 9: Use the horizontal fixed stay rope (10) to connect the hanging basket half-basket (7) with the vibrating tower operating platform (5), and fix the hanging basket half-basket (7) at the position determined in step 5; Step 10: Adjust the activity space between the hanging basket half-basket (7) and the second-level hooded rocket body (2), the free suspension tooling wire rope (12), and the vibrating tower operating platform (5), so that the minimum distance is greater than 100mm; The steps of the method for implementing the method for fixing the boundary of the fairing in the vibrating tower include: Step 1: Fix the tooling; Step 1.1: According to the distribution position and size of the protrusions at the docking surface of the fairing (11), the form of the docking surface and the distribution size of the docking holes, determine the circumference of the punching hole (15) and the through holes used to avoid structural interference on the docking surface ( 16) location; Step 1.2: Determine the size of the through hole (16) for avoiding structural interference of the docking surface according to the size of the space required for assembly and docking operations of the fairing (11) test site; Step 1.3: Determine the tooling inner diameter (13) and tooling outer diameter (14) according to the distribution form of the ground rails on the ground of the second underground floor (F-2) in the vibrating tower and the ground rail spacing of 1m; Step 1.4: On-site punching of fixing tooling; Step 2: Fix Boundary Implementation Step 2.1: Analyze the force state of the butt joint surface of the fairing (11) in the vertical support state, and determine the height and distribution mode of the fairing spacer (18) and the fairing basket spacer (19); Step 2.2: The fairing (11) is hoisted into the tower, and it is in an upright support state, and rubber pads of the same thickness are covered on the surfaces of the fairing cushion block (18) and the fairing basket cushion block (19); Step 2.3: Wrap the tape around the middle part of the fairing (11), and then connect the tape to the basement floor (F-1) of the vibrating tower through the horizontal protection device (6); Step 2.4: The fairing basket (3) is separated from the fairing (11) to form two half-baskets (7), and the half-basket (7) is placed on the second floor (F-2) of the vibration tower on the ground; Step 2.5: Install the fairing end journal (22) on the end journal joint of the fairing (11) with fastening bolts; Step 2.6: Use the vibrating tower crane (20) and the sling (21) to lift the fairing (11) to a height of 500mm; Step 2.7: Remove the fairing block (18) and the fairing basket block (19) from the fixing tooling, and place them on the ground of the second underground floor (F-2) of the vibrating tower; Step 2.8: The fairing (11) is docked with the fixing tool; Step 2.9: Fix the support tooling. 2. a kind of two-stage band cover free boundary and fairing as claimed in claim 1 are in vibrating tower internal fixed support boundary implementation method, it is characterized in that when fairing is implemented in vibrating tower internal fixed support boundary, the rectification in step 2.1 The cowl spacer (18) and the fairing basket spacer (19) are evenly distributed, and at the same time the height difference between the fairing spacer (18) and the fairing basket spacer (19) is the same as that of the fairing basket lower end surface The height difference of the docking surfaces is the same, and the plane area of each block is not less than 200mm×200mm.