液体晃动有限元模态分析及试验研究

Finite Element Modal Analysis and Dynamic Experimental for Liquid Sloshing

通过试验分析和数值仿真,研究了水平圆柱形贮箱内液体横向晃动特性。分析了贮藏箱在各种充液比下液体的晃动特性,利用扫描式激光测振仪结合试验设计较好地解决了液面波形直接测量的问题。通过有限元软件Ansys较好地模拟出液体低阶晃动振型和高阶局部振动情况,并通过虚拟质量法校核液体横向晃动低阶频率值。将有限元计算结果与试验实测结果进行了比较,发现两种方法对比研究能较好地解决这类液体系统模态分析问题。

In this paper the dynamic characteristics of liquid sloshing in a level column tank is studied by experimental analysis and numerical simulation method. Liquid system modes of different full rates under level power are simulated. We combine some specific experimental designs and the scan laser measure instrument, and find a better way to directly measure the liquid wave fluctuation. Ansys FEA software is used to simulate preferably low-rank modes and local modes of liquid systems, and dummy-mass method is used to correct the low-rank frequencies of liquid sloshing. The FEA numerical simulation results and the experimental results showed that mode analysis of the liquid systems can be solved preferably by combining the two methods.