不同支撑刚度对输流管道系统动力学特性完整性影响

摘要

针对输流管道系统支撑位置与刚度变化会引起输流管道动力学特性改变等问题,基于输流管道流固耦合作用,将支撑简化为等效质量及六个方向刚度系数弹簧,分析不同刚度系数下输流管道固有频率与相对振幅值,分析与评估不同支撑刚度对输流管道系统动力学特性完整性影响.结果表明,选择合适的支撑刚度对完善输流管道动力学特性的完整性作用非常重要.%The supporting of a pipeline conveying fluid is one of influence factors on its dynamic characteristics. The supporting position and rigidity changes may cause the dynamic characteristics changes of the pipeline conveying fluid. Based on the fluid-structure interaction, and simplifying the supporting as an equivalent mass and a spring with rigidity coefficients in six directions, the natural frequencies and relative amplitude values of the pipeline conveying fluid were analyzed under different supporting rigidities. And then the effect of different supporting rigidities on the dynamic characteristics integrity of the pipeline conveying fluid was studied and evaluated. The results showed that choosing an appropriate supporting rigidity can play an important role in perfecting the dynamic characteristics integrity of a pipeline conveying fluid.