CN205655977U - Free displacement interference effect test device of riser crowd - Google Patents

Abstract

The utility model belongs to the field of marine riser vibration testing, and relates to a device capable of performing a free-variable-distance interference effect test of riser groups in a combined wind-wave-current water tank. The device includes a steel structure bracket, an upper sliding channel, a lower sliding channel and a diagonal stay. The steel structure bracket is welded by angle steel, and multiple diagonal supports are welded on both sides near the side wall of the tank, and are fixed on the side of the standpipe and the bottom of the bracket. Reserve bolt holes. The upper sliding channel is connected to the bracket by high-strength bolts, and four diagonal stay rods are set on the top, and the lower sliding channel is respectively connected to the bracket and the bottom of the tank through pre-embedded high-strength bolts; the upper sliding channel and the lower sliding channel are arranged symmetrically, The same design, consisting of 2 sliding channels along the width direction of the tank and 5 sliding channels along the length direction of the tank. The standpipe supports are respectively installed on the 5 sliding channels along the length direction of the tank. The overlapping positions are respectively fixed with bolts. The utility model can change the side-by-side spacing between the standpipes by adjusting the bolts at the overlapping positions of the channels, and change the front and rear spacing between the standpipes by adjusting the bolts at the overlapping positions of the support and the channels, so as to achieve The group can freely change the distance in the tank, and then carry out the test of the riser group with different spacing.

Description

A test device for free-variable-distance interference effect of standpipe groups

technical field

The utility model belongs to the field of marine riser vibration testing, in particular to a device capable of performing a free-variable-distance interference effect test of riser groups in a combined wind-wave-current water tank.

Background technique

Offshore risers are used to connect offshore platforms and subsea wellheads, and are necessary transmission pipelines for the development of deep-sea oil and gas resources, such as risers for oil and gas transportation, risers for drilling, oil production, and water injection on platforms, etc. During the service period of deepwater risers, there are often multiple risers arranged in different arrangements on a platform to form a riser group to work. When an external flow field passes through, the vortex shedding mode of the riser group will change greatly. Tubes are affected by the wake of other risers, creating an "interference effect". Due to the existence of the interference effect, the vortex-induced vibration law of the standpipe is greatly changed compared with that of a single standpipe, which will aggravate the fatigue damage of the standpipe and become an important safety factor during the service period of the standpipe. Once damaged, it will cause huge economic losses and lead to serious marine pollution and irreversible ecological disasters.

For the interference effect of the standpipe, the method of model test and numerical simulation is mainly used at present, and the model test is the best means to explore the mechanism of the interference effect, but the current interference test for the standpipe mainly focuses on double pipes side by side or arranged in front and back. The unidirectional study does not take into account the dynamic response law of the riser group.

Utility model content

The purpose of this utility model is to design a device for the interference effect test of the standpipe group in the wind-wave-flow combined water tank, which can realize the interference effect of the standpipe group with different distances and arrangements. effect test.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the device includes a steel structure bracket, an upper sliding channel, a lower sliding channel and a diagonal tie rod. The side of the fixed riser and the bottom of the bracket are reserved for bolt holes. The upper sliding channel and the bracket are connected by high-strength bolts, and four diagonal stay rods are arranged on the top. The lower sliding channel is respectively connected with the The bracket is connected to the bottom of the tank, the upper sliding channel and the lower sliding channel are arranged symmetrically, with the same design, consisting of 2 sliding channels along the width direction of the tank and 5 sliding channels along the length direction of the tank, and the standpipe supports are respectively installed on 5 On the sliding channel along the length direction of the water tank, the overlapping position of the channel and the overlapping position of the support and the channel are respectively fixed by bolts. After installation, the standpipe group can slide freely along the length and width of the tank, and the spacing can be changed.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Among them, 1—steel structure support, 2—upper sliding channel, 3—lower sliding channel, 4—diagonal tie rod, 5—standpipe, 6—hinged support.

detailed description

As shown in Figure 1, the test device for the free variable distance interference effect of the standpipe group includes a steel structure support 1, an upper sliding channel 2, a lower sliding channel 3 and a diagonal rod 4; the steel structure support 1 is welded by angle steel Multiple oblique supports are welded on both sides of the side wall, and bolt holes are reserved on one side of the fixed standpipe 5 and the bottom of the steel structure support 1. The upper sliding channel 2 is connected to the steel structure support 1 through high-strength bolts, and four diagonal stay rods 4 are arranged on the top. The lower sliding channel 2 is respectively connected to the steel structure support 1 and the bottom of the tank through embedded high-strength bolts. The upper sliding channel 2 and the lower sliding channel 3 are arranged symmetrically and have the same design. They are composed of two sliding channels along the width direction of the water tank and five sliding channels along the length direction of the water tank. Above, the overlapping position of the channel and the steel structure support 1 and the overlapping position of the hinged support 6 and the channel are respectively fixed with high-strength bolts.

Claims (2)

1. A standpipe group free variable distance interference effect test device is characterized in that: it includes a steel structure support, an upper sliding channel, a lower sliding channel and a diagonal tie rod, and the steel structure support is welded by angle steel, and is placed on two sides near the side wall of the water tank. The side is welded with multiple diagonal supports, and bolt holes are reserved on the side of the fixed riser and the bottom of the bracket; the upper sliding channel and the bracket are connected by high-strength bolts, and four diagonal stay rods are set on the top, and the lower sliding channel is pre-embedded with high-strength bolts. The bolts are respectively connected to the bracket and the bottom of the tank. The upper sliding channel and the lower sliding channel are symmetrically arranged, with the same design, consisting of 2 sliding channels along the width direction of the tank and 5 sliding channels along the length direction of the tank. The standpipe supports are installed separately. On the 5 sliding channels along the length direction of the water tank, the overlapping positions of the channels and the overlapping positions of the support and the channels are respectively fixed by bolts. 2. The free variable pitch interference effect test device for standpipe groups according to claim 1, characterized in that: the sliding channels are symmetrically arranged up and down, the sliding channels as a whole are rectangular, and the bolts at the overlapping positions of the adjusting channels , change the parallel spacing between the standpipes, by adjusting the bolts at the overlapping position of the support and the channel, change the front and rear spacing between the standpipes, so as to achieve the purpose of freely changing the distance between the standpipe groups in the tank, and then expand different spacing riser group test.