Wind-induced vibration analysis method of large slenderness ratio continuous structure
A technology with large slenderness ratio and wind-induced vibration, applied in the fields of instruments, electrical digital data processing, geometric CAD, etc., it can solve the problems of large occupation, large system load, long calculation time, etc., to achieve fluid-structure coupling and improve analysis efficiency. , the effect of optimizing the analysis method
Active Publication Date: 2020-04-14
CHINA MAJOR BRIDGE ENERGINEERING
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Problems solved by technology
The calculation process of large-scale commercial general-purpose software takes up a lot of computer resources, the system load is heavy, and the calculation time is long, and it cannot meet the analysis needs of wind-induced vibration of civil engineering structures with huge size, complex shape and large aspect ratio.
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[0048]The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0049] see figure 1 As shown, the embodiment of the present invention provides a wind-induced vibration analysis method of a large slenderness ratio continuous structure, mainly by establishing a calculation model for common use of structural dynamic analysis and structural aerodynamic analysis, specifically including steps:
[0050] S1. Divide the large slenderness ratio continuous structure into several segments along its length direction, establish a plastid multi-degree-of-freedom system composed of these several segments, and construct a dynamic analysis model of the plastid multi-degree-of-freedom system.
[0051] S2. According to the segmented shape of the mass body multi-degree-of-freedom system, a computational fluid dynamics CFD (Computational Fluid Dynamics) calculation model is established, and the surface grid and the fluid calcula...
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The invention discloses a wind-induced vibration analysis method of a large slenderness ratio continuous structure, and relates to the technical field of bridge wind resistance. The method comprises the steps: dividing the continuous structure into a plurality of segments in the length direction, building a plastid multi-degree-of-freedom system and constructing a kinetic analysis model of the plastid multi-degree-of-freedom system; establishing a CFD calculation model according to the segmented form of the plastid multi-degree-of-freedom system; constructing a resolving module of the kineticanalysis model; carrying out modal analysis on the plastid multi-degree-of-freedom system, and constructing a motion differential equation of the plastid multi-degree-of-freedom system; and performingaerodynamic time-history analysis on the CFD calculation model at a given wind speed and solving the motion differential equation of the plastid multi-degree-of-freedom system to obtain aerodynamic response of the continuous structure. According to the method, a numerical wind tunnel capable of visually displaying the aerodynamic effect of the continuous structure with the large slenderness ratiois constructed, and participation conditions of all modes during wind-induced vibration of the continuous structure and aerodynamic response at the given wind speed are clearly displayed; and the analysis method is optimized, and the analysis efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of bridge wind resistance, in particular to a wind-induced vibration analysis method of a continuous structure with a large slenderness ratio. Background technique [0002] At present, the analysis methods for wind-induced vibration of structures mainly include theoretical analysis, wind tunnel test and numerical simulation. In order to study the interaction between the flow field and the structure, the theoretical analysis method assumes the approximate expression of the aerodynamic force acting on the structure, and its parameters need to be obtained through wind tunnel tests. The results obtained by the wind tunnel experiment method are more authentic and reliable, which is the basis of theoretical analysis and numerical simulation methods, and is the most important method for the study of wind-induced vibration of continuous structures with large slenderness ratios. However, wind tunnel experiments are ...
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Login to View More IPC IPC(8): G06F30/13G06F30/23G06F30/28G06F111/10G06F119/14
CPCY02T90/00
Inventor 潘晓民周君嵩汪胜义詹昊谢波吴江辉毛利群袁毅张先蓉吴阳
Owner CHINA MAJOR BRIDGE ENERGINEERING