基于ANSYS大流量管路流固耦合振动分析

Vibration Analysis of Fluid-structure Interaction for Large Flow Pipeline with ANSYS

该文对液压系统管路流固耦合进行研究,建立大流量液压管路和流固耦合的数学模型。应用ANSYS软件研究不同条件(管路支撑间距、管路厚度)对管路特性的影响。分析结果表明:在其他条件不变的情况下,随着两支撑间距的增加,管路固有频率呈先增大后减小的趋势;随着管路厚度的增加,管路刚度增强,其固有频率也逐渐增大。在此基础上以超大型三轴试验仪为例,根据实际情况建立其大流量回油管路模型,探讨其振动问题。最后,应用以上研究结论提出不同的解决方案,通过仿真分析确定所选方案的参数,其研究成果可为其它管路系统的设计提供参考。

In this paper, the flow of hydraulic subsystem fluid-structure interaction was studied, established the mathematic model of the hydraulic line and fluid-structure interaction. Studied the impact of various conditions（pipe support spacing,wall thickness） on the pipeline characteristics by using ANSYS software. Analysis results show that： in the case of other conditions unchanged, With the increase of two support spacing, natural frequency of pipeline decreased after increasing; with the increase of thickness of pipeline, pipeline stiffness enhancement, its inherent frequency is also gradually increased. On this basis, taking super large triaxial test apparatus as an example, according to actual circumstances, establish its back pipeline model; study the vibration problem of pipeline. Finally, applying the above research conclusion put forward different solutions,determine the parameters of the selected solution by simulation analysis. The research results can provide reference for the design of other piping systems.