空间充气圆环动力学特性仿真分析

Numerical Simulation of Space Inflatable Torus Dynamic Behavior

研究空间充气圆环控制问题,对动力学特性进行分析,通过数值计算得到了充气圆环内力分布、固有频率及振型。重点研究了材料非线性特性对充气圆环动态特性的影响,研究了充气内压、厚度、圆环半径、圆环管径变化对空间充气圆环动力学特性的影响。仿真结果表明,材料非线性特性降低了充气圆环固有频率,充气内压越大这种影响越显著。充气圆环各阶固有频率随其内压增大而增大,随厚度增大而减小,并随半径增大而减小,随管径增大而增大。

In this paper,the dynamic properties of inflatable torus are investigated. The stress distribution,natural frequencies and mode shapes are analyzed by the numerical simulation. This paper focuses on the effect of material nonlinearity on the dynamic properties of inflatable torus,and the parametric study on natural frequencies of inflatable torus is researched. Research results show that the effect of material nonlinearity reduces the natural frequencies,and the effect becomes more significantly as the internal pressure increasing. The natural frequencies of inflatable torus increase as the internal pressure increasing,decrease as the thickness increasing,decrease as the torus radius increasing,increase as the tube radius increasing.