Prediction method of coupling response of rigid cylinder with cross-flow and forward-flow vortex-induced vibration

A technology for vortex-induced vibration and prediction methods, applied in instrumentation, geometric CAD, design optimization/simulation, etc.

Active Publication Date: 2022-06-07
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

For this cylinder model, which considers the geometric nonlinearity of the structure and the mutual coupling between the CF direction and the IL direction, the vortex-induced vibration response characteristics need to be further studied

Method used

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  • Prediction method of coupling response of rigid cylinder with cross-flow and forward-flow vortex-induced vibration
  • Prediction method of coupling response of rigid cylinder with cross-flow and forward-flow vortex-induced vibration
  • Prediction method of coupling response of rigid cylinder with cross-flow and forward-flow vortex-induced vibration

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Embodiment Construction

[0071] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0072] The invention provides a method for predicting the coupling response of vortex-induced vibration in the transverse and downstream directions of a rigid cylinder, which mainly includes the following steps:

[0073] 1) Establish a vibration control equation in which the cross-flow direction and the downstream direction are coupled to each other

[0074] 2) Solve the coupled vibration control equations based on the finite difference method;

[0075] 3) Calculate and analyze the instance based on the analysis data.

[0076] Step 1: Establish the vibration control equation in which the structure and the flow field are coupled with each other, as follows:

[0077] like figure 1 As shown, consider the vortex-induced vibration response prob...

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Abstract

The invention discloses a method for predicting the coupled response of vortex-induced vibration in the cross-flow direction and the downstream direction of a rigid cylinder, which mainly includes the following steps: 1) establishing a vibration control equation in which the cross-flow direction and the downstream direction are mutually coupled; 2) based on the finite difference method Solve the coupled vibration governing equations; 3) Calculate and analyze the examples based on the analyzed data. The invention studies the coupled vibration response of the rigid cylinder in the cross-flow and forward-flow directions. A complete cross-flow and downstream coupled vibration model is established to analyze the vortex-induced vibration response prediction problem of a rigid cylinder considering both cross-flow vibration, downstream vibration and structural geometric nonlinearity. The model can well simulate the structure locking and displacement catastrophe.

Description

technical field [0001] The invention relates to the field of vortex-induced vibration response of a cylindrical body, in particular, to a method for predicting the coupled response of vortex-induced vibration of a rigid cylindrical body in the transverse and downstream directions. Background technique [0002] Cylinders widely exist in various practical projects. Cylinders will form alternating shedding vortices on both sides of the structure in a certain incoming flow. Periodic vortex shedding will generate periodic drag and lift forces on the structure. If the structure is elastically supported, the periodic drag force and lift force will cause the structure to produce periodic vibrations in the downstream and cross-flow directions, collectively referred to as "vortex-induced vibration" (Gao, Y, Fu, SX, Xiong, YM, Zhao, Y, and Liu, LM, Experimental study onresponse performance of vortex-induced vibration of a flexible cylinder, Ships and Offshore Structures, 2017, 12(1):11...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/17G06F30/23
Inventor 高云张壮壮刘黎明杨斌邹丽宗智
Owner SOUTHWEST PETROLEUM UNIV
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