Structure optimization design of high frequency dynamic test instrument

Vibration isolator is widely used in aerospace, vehicle, ship and other industries, its dynamic stiffness, impedance and other dynamic performance are its core parameters. A large number of test instruments have been developed for dynamic performance test of vibration isolators, but they are usually aimed at low frequency, light load and simple structure of vibration isolators. For vibration isolators with different characteristics, it is usually necessary to carry out specific structural design for their test instruments to avoid resonance and other safety problems during the test. In this paper, the structure design of dynamic performance test instrument for a certain type of high frequency vibration isolator was carried out. Based on the modal analysis of finite element simulation, the beam, column and foundation of the test instrument were optimized. And the variation law of its natural frequency was summarized. The simulation results showed that the optimized test instrument could meet the safety requirements. Its natural frequency was above 1000Hz, which could be used for the next step of production and manufacturing. This study also provided guidance for the structural design of the high frequency dynamic test instrument.