CN110608838A - Vertical load force system test structure of similar guide column type force measuring frame and its manufacturing method - Google Patents

Abstract

The invention provides a vertical load force system test structure of a similar guide post type force measuring frame and its manufacturing method. Firstly, a high separation load identification point area is defined on the similar guide post type force measuring frame, and then each high Multiple strain gauges are pasted on the area of separation load identification point to form multiple sets of full-bridge circuit structures; the frame structure with strain gauges is statically calibrated on the multi-channel loading force-measuring frame calibration test bench, and each decoupling calculation for each full-bridge circuit structure, and find a group or groups of bridge structures with the highest mutual decoupling accuracy, or find a group or groups of bridge structures that can meet the requirements of decoupling accuracy; finally, according to the final After the determined bridge structure, the production of the force-measuring frame is completed. By adopting the structure and method provided by the invention, a full-bridge circuit is formed at each corner of the force-measuring frame, on the one hand, the wiring distance is shortened, and on the other hand, the number of full-bridge circuits is increased, thereby improving the test accuracy.

Description

Vertical load force system test structure of similar guide column type force measuring frame and its manufacturing method

technical field

The invention relates to a structure for testing the vertical load force system of a similar guide column type force measuring frame of a rail vehicle.

Background technique

The vertical load force system of rail vehicle bogie includes heave load, roll load and torsional load.

For the guide column bogies widely used in railway passenger cars, in the prior art, when analyzing the vertical load force system for the frame structure, the beam test method is usually used, that is, the strain Chips, according to the test needs to form a full-bridge circuit for heaving, rolling or torsional loads. This method has a long circuit wiring distance, is easy to be damaged, and has low system test accuracy.

Contents of the invention

The purpose of the present invention is to provide a vertical load force system test structure of a kind of guide post type force measuring frame and its manufacturing method. By forming a full bridge circuit at each corner of the force measuring frame, the wiring distance is shortened on the one hand, and on the other hand On the one hand, the number of full-bridge circuits is increased, thereby improving test accuracy.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A vertical load force system test structure of a guide column type force measuring frame. The guide column type force measuring frame has two side beams and two cross beams, and the two ends of the two side beams form the four corners of the force measuring frame. It is characterized by:

Four high-resolution load identification point areas are defined on the four corners, which are:

The first area: the outer edge of the upper cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The second area: the outer edge of the lower cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The third area: the inner edge of the upper cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The fourth area: the inner edge of the lower cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The so-called proximal beam refers to the beam that is closer to the corner of each area;

Paste at least one strain gauge on each high-separation load identification point area; say: the strain gauge on the first area is the first strain gauge, the strain gauge on the second area is the second strain gauge, and the strain gauge on the third area is called the second strain gauge. The strain gauge is the third strain gauge, and the strain gauge on the fourth area is the fourth strain gauge; a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge on the same corner are composed A full bridge circuit structure;

In the full-bridge circuit structure, the first strain gauge and the second strain gauge form an adjacent arm, the third strain gauge and the fourth strain gauge form an adjacent arm, the first strain gauge and the third strain gauge form an opposite arm, and the second strain gauge Form a pair of arms with the fourth strain gauge.

The vertical load force system test structure of the similar guide post-type force-measuring frame, wherein at least one set of spare full-bridge circuit structures is arranged at each corner of the force-measuring frame.

The vertical load force system test structure of the quasi-guiding pillar type force measuring frame, wherein the quasi-guiding pillar type force measuring frame is a guide pillar type force measuring frame, a cone laminated rubber spring type force measuring frame or a cylindrical laminated Rubber spring force measuring frame.

The invention also provides a method for manufacturing a vertical load force system test structure of a similar guide column type force measuring frame. The four corners of the force-measuring frame are characterized in that the manufacturing method comprises the following steps:

(1) Four high-resolution load identification point areas are defined on the four corners, which are:

The first area: the outer edge of the upper cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The second area: the outer edge of the lower cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The third area: the inner edge of the upper cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The fourth area: the inner edge of the lower cover of the side beam, and is located between the connection between the side beam and the proximal cross beam and the center of the outer spring strut seat;

The so-called proximal beam refers to the beam that is closer to the corner of each area;

(2) Paste multiple strain gauges on each high-separation load identification point area; say: the strain gauge on the first area is the first strain gauge, the strain gauge on the second area is the second strain gauge, and the third strain gauge is The strain gauge on the area is the third strain gauge, and the strain gauge on the fourth area is the fourth strain gauge; use any first strain gauge, any second strain gauge, and any third strain gauge on the same corner And any fourth strain gauge can form a group of full-bridge circuit structures;

In each full-bridge circuit structure, the first strain gauge and the second strain gauge form an adjacent arm, the third strain gauge and the fourth strain gauge form an adjacent arm, the first strain gauge and the third strain gauge form an opposite arm, and the second strain gauge The sheet and the fourth strain sheet form a pair of arms;

(3) Statically calibrate the frame structure with strain gauges on the multi-channel loading force measuring frame calibration test bench, and decouple calculations for each full-bridge circuit structure one by one, and find the one with the highest mutual decoupling accuracy Group or groups of bridge structures, or find a group or groups of bridge structures that can meet the requirements of decoupling accuracy;

(4) According to the finalized bridge structure, complete the production of the force-measuring frame.

The method for making the vertical load force system test structure of the guide column-like force measuring frame, wherein: in step (4), at least one set of spare bridge structures is arranged at each corner of the force measuring frame.

The manufacturing method of the vertical load force system test structure of the quasi-guiding column type force measuring frame, wherein the quasi-guiding column type force measuring frame is a guide column type force measuring frame, a conical laminated rubber spring type force measuring frame or Cylindrical laminated rubber spring force measuring frame.

The present invention aims at the force characteristics of the similar guide-pillar bogie frame. Strain gauges are pasted on the edge of the side beam upper cover plate and lower cover plate between the axle box and the beam to form a full-bridge circuit, and are arranged at the symmetrical positions of the four corners of the frame. The same four full-bridge circuits are divided into four vertical loads at four positions, and then combined calculations are performed to obtain three vertical load systems of ups and downs, roll and torsion, which can greatly improve the test accuracy.

According to the motion characteristics of the frame, the present invention designs the bogie force-measuring frame directly aiming at the test requirements of the frame buoyancy force system, roll force system, and torsional force system; An independent full-bridge circuit is designed at the vertical force position, and based on careful calculation, the three combined test force systems of ups and downs, roll and torsion have a greater response level, and at the same time, the interference response generated by other force systems is better than that of the test The response is about two orders of magnitude lower to ensure decoupling accuracy of the force systems. The proposal of the bogie force measuring frame not only ensures the test accuracy, but also makes the measured load and the structural strain present a better quasi-static relationship.

Description of drawings

Figure 1 is a top view schematic diagram of the dynamometer frame of the 209P passenger car;

Fig. 1A is the bridge structure diagram of the vertical load test structure of the dynamometer frame of the 209P passenger car;

Figure 2 and Figure 3 are the strain gauge pasting areas of the vertical load test structure of the dynamometer frame of the 209P passenger car.

Fig. 4 is a top view schematic diagram of the CW-2000 subway force measuring frame;

Fig. 4A is the bridge structure diagram of the vertical load test structure of the CW-2000 type subway force measuring frame;

Figure 5 and Figure 6 are the sticking area of the strain gauge of the vertical load test structure of the dynamometer frame of the CW-2000 subway car.

Explanation of reference signs: 1-first strain gauge; 2-second strain gauge; 3-third strain gauge; 4-fourth strain gauge; Q1-one-position angle; Q2-two-position angle; Q3-three-position angle ;Q4-four corners; 51-inner spring support seat; 52-outer spring support seat; 71-beam; 81-outer edge of side beam upper cover plate; The inner edge of the cover plate; 84-the inner edge of the lower cover plate of the side beam; S1-range; S2-range.

Detailed ways

Combined with the accompanying drawings, the manufacturing method of the bogie force-measuring frame is introduced as follows:

(1) Using the finite element method to establish the finite element model of the guide column type force-measuring frame, apply simulated loads to the frame structure, design the strain group bridge method on the frame according to the vertical load force system, and determine the high-separation load identification of the force-measuring frame point area.

In this step (1), the specific process and steps of finding the high-separation load identification point area on the frame do not belong to the scope of protection claimed by the present invention, nor will it affect the public's use of the present invention for load testing, so , the present invention will not go into details.

The present invention can determine that: the typical guide column type force-measuring frame as shown in Figure 1 (taking the 209P type passenger car force-measuring frame as an example), has two side beams and two crossbeams 71, two side beams of the two side beams The ends constitute the four corners of the force measuring frame. The four corners are respectively named as the first angle Q1, the second angle Q2, the third angle Q3 and the fourth angle Q4. There are four high-resolution load identification point areas on each corner. , respectively:

The first area: the outer edge 81 of the upper cover plate of the side beam, and is located between the connection between the side beam and the proximal cross beam 71 and the center of the outer spring support seat 52 (as shown in the range S1);

The second area: the outer edge 82 of the lower cover plate of the side beam, and is located between the connection between the side beam and the proximal cross beam 71 and the center of the outer spring support seat 52 (as shown in the range S1);

The third area: the inner edge 83 of the upper cover plate of the side beam, and is located between the connection between the side beam and the proximal beam 71 and the center of the outer spring support seat 52 (as shown in the range S2);

The fourth area: the inner edge 84 of the lower cover of the side beam, and is located between the connection between the side beam and the proximal cross beam 71 and the center of the outer spring strut seat 52 (as shown in the range S2);

The so-called proximal beam refers to the beam that is closer to the corners of the regions.

(2) Paste multiple strain gauges on each high-separation load recognition point area; say: the strain gauge on the first area is the first strain gauge 1, and the strain gauge on the second area is the second strain gauge 2, The strain gauge on the third area is the third strain gauge 3, and the strain gauge on the fourth area is the fourth strain gauge 4; due to the first strain gauge 1, the second strain gauge 2, the third strain gauge 3 and the fourth strain gauge There are multiple gauges 4, so any first strain gauge 1, any second strain gauge 2, any third strain gauge 3, and any fourth strain gauge 4 can be used to form a set of full-bridge circuit structures; As shown in Figure 1A, in each full-bridge circuit structure, the first strain gauge 1 and the second strain gauge 2 form an adjacent arm, the third strain gauge 3 and the fourth strain gauge 4 form an adjacent arm, and the first strain gauge 1 and the fourth strain gauge 4 form an adjacent arm. The third strain gauge 3 forms a pair of arms, and the second strain gauge 2 and the fourth strain gauge 4 form a pair of arms;

(3) Statically calibrate the frame structure with strain gauges on the special calibration test bench for multi-channel loading force measuring frame, and decouple each full-bridge circuit structure one by one to find the highest mutual decoupling accuracy One or several groups of bridge structures, or find a group or several groups of bridge structures that can meet the requirements of decoupling accuracy;

Among them, the so-called decoupling accuracy refers to the responsiveness of the output of the full-bridge circuit to the tested force system, and the ability of other disturbing force systems (such as lateral load force systems) to affect the tested force system on the full-bridge circuit. High decoupling accuracy means that the full-bridge circuit has a high response to the tested force system and is less affected by the disturbance force system.

(4) Complete the production of the force-measuring frame according to the final bridge structure; that is, remove the redundant strain gauges, and, if necessary, re-attach the strain gauges at the determined strain gauge pasting positions; if necessary, will Arrange at least one set of spare bridge structures at each corner of the force-measuring frame.

Please refer to Fig. 4, Fig. 4A, Fig. 5, and Fig. 6, which are when the present invention is applied to the CW-2000 type subway force-measuring frame (cone laminated rubber spring-type force-measuring frame similar in structure to the guide column type force-measuring frame) , the structures and methods adopted are the same as those in the previous embodiment, and will not be repeated here.

Therefore, it can be considered that the vertical load force system test structure and manufacturing method of the guide post type force measuring frame provided by the present invention can also be applied to the cone laminated rubber spring force measuring frame and the cylinder laminated rubber spring force measuring frame. In terms of structure, here, the guide column type force measuring frame, the cone laminated rubber spring type force measuring frame and the cylindrical laminated rubber spring type force measuring frame are collectively referred to as the guide column type force measuring frame.

Claims (6)

1. The utility model provides a vertical loading capacity of kind guide pillar formula dynamometry framework is test structure, this kind of guide pillar formula dynamometry framework have two curb girders and two crossbeams, and the both ends of two curb girders constitute the four corners of this dynamometry framework, its characterized in that:

four high-resolution load identification point areas are defined on the four corners, and are respectively as follows:

a first region: the outer edge of the upper cover plate of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer spring support seat;

a second region: the outer edge of the lower cover plate of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer spring support seat;

a third region: the upper cover plate inner edge of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer side spring support seat;

a fourth region: the lower cover plate inner edge of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer side spring support seat;

the near side beam is the beam which is closer to the angle of each area;

adhering at least one strain gauge on each high-resolution load identification point area; weighing: the strain gauge on the first area is a first strain gauge, the strain gauge on the second area is a second strain gauge, the strain gauge on the third area is a third strain gauge, and the strain gauge on the fourth area is a fourth strain gauge; a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge on the same corner form a full-bridge circuit structure;

in the full-bridge circuit structure, the first strain gauge and the second strain gauge form an adjacent arm, the third strain gauge and the fourth strain gauge form an adjacent arm, the first strain gauge and the third strain gauge form an arm pair, and the second strain gauge and the fourth strain gauge form an arm pair.

2. The vertical load force system test structure of a guide-pillar-like dynamometric frame of claim 1, wherein: at least one set of redundant full-bridge circuit arrangements is arranged at each corner of the dynamometric frame.

3. The vertical load force system test structure of a guide-pillar-like dynamometric frame of claim 1, wherein: the guide-column-like force measuring framework is a guide-column type force measuring framework, a conical laminated rubber spring type force measuring framework or a cylindrical laminated rubber spring type force measuring framework.

4. A kind of guide pillar type dynamometry framework's vertical loading force is the test structure's preparation method, this kind of guide pillar type dynamometry framework has two curb girders and two crossbeams, the both ends of two curb girders constitute this dynamometry framework's four corners, characterized by that, this preparation method includes the following steps:

(1) four high-resolution load identification point areas are defined on the four corners, and are respectively as follows:

a first region: the outer edge of the upper cover plate of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer spring support seat;

a second region: the outer edge of the lower cover plate of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer spring support seat;

a third region: the upper cover plate inner edge of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer side spring support seat;

a fourth region: the lower cover plate inner edge of the side beam is positioned between the joint of the side beam and the near side beam and the center of the outer side spring support seat;

the near side beam is the beam which is closer to the angle of each area;

(2) adhering a plurality of strain gauges to each high-resolution load identification point area; weighing: the strain gauge on the first area is a first strain gauge, the strain gauge on the second area is a second strain gauge, the strain gauge on the third area is a third strain gauge, and the strain gauge on the fourth area is a fourth strain gauge; any one first strain gauge, any one second strain gauge, any one third strain gauge and any one fourth strain gauge on the same corner can form a group of full-bridge circuit structures;

in each full-bridge circuit structure, a first strain gauge and a second strain gauge form an adjacent arm, a third strain gauge and a fourth strain gauge form an adjacent arm, the first strain gauge and the third strain gauge form an arm pair, and the second strain gauge and the fourth strain gauge form an arm pair;

(3) the method comprises the following steps that static calibration is carried out on a framework structure attached with strain gauges on a multichannel loading force measurement framework calibration test bed, decoupling calculation is carried out on each full-bridge circuit structure one by one, and one or more groups of bridge structures with the highest mutual decoupling precision or one or more groups of bridge structures meeting the decoupling precision requirement are found;

(4) and finishing the manufacture of the force measuring framework according to the finally determined bridge combination structure.

5. The method of making a vertical load force system test structure for a guide-pillar-like dynamometric frame of claim 4, wherein: in the step (4), at least one group of standby bridge structures is arranged at each corner of the force measuring frame.

6. The method of making a vertical load force system test structure for a guide-pillar-like dynamometric frame of claim 4, wherein: the guide-column-like force measuring framework is a guide-column type force measuring framework, a conical laminated rubber spring type force measuring framework or a cylindrical laminated rubber spring type force measuring framework.