为验证并提高三轴振动试验系统工作平台的谐振频率,进而提高系统的工作频率范围,文章采用有限元软件对平台在自由状态下的模态进行仿真。比较仿真结果与三轴振动试验结果可以看出,对角和对边弯曲频率偏差较小。该结果可为后续设计工作提供相对精确的计算指导。 In order to verify and improve the resonant frequency of the working platform of the three-axis vibration test system and further improve the working frequency range of the system, finite element software is used to simulate the platform in a free state mode. Comparing the simulation results with the results of triaxial vibration test, it can be seen that the deviation of diagonal and opposite-side bending frequency is small. This result provides relatively accurate calculation guidance for subsequent design work.