以有限元理论为基础,运用有限元分析软件对车载桁架式天线系统进行结构动态分析及稳定性分析。模态分析的结果表明天线系统的低阶固有频率较低,不当的使用会导致结构的共振。稳定性分析表明天线结构的失稳属于局部屈曲行为,进一步的非线性屈曲分析表明,屈曲的临界载荷在正常工作载荷外,不影响系统工作。 Based on the finite element theory, the structural dynamic analysis and stability analysis of truss antenna system using finite element analysis software. The results of modal analysis show that the low-order natural frequency of the antenna system is low, and improper use can lead to structural resonance. Stability analysis shows that the instability of the antenna structure belongs to the local buckling behavior. Further nonlinear buckling analysis shows that the critical load of buckling does not affect the system work under the normal working load.