基于有限元法的某机载雷达频综器减振设计

摘要

Finite element method is used to study the frequency synthesizer of an airborne ra-dar by the design of vibration reduction.Natural frequencies of the frequency synthesizer,overall stress level and vibration response of vibration sen-sitive positions under airborne conditions is ob-tained by modal analysis and random vibration a-nalysis.The system natural frequency and vibra-tion transmissibility are obtained by the results of the analysis,and accordingly a vibration isolator is chosen.An experiment is carried out to study the damping characteristic of the selected vibration iso-lator;the results show that the vibration reduction design is feasible.%基于有限元分析方法，对某机载雷达频综器进行减振设计。通过模态分析、随机振动分析分别得到频综器的固有频率、整体应力水平和载机环境下振动敏感位置的振动响应。基于分析结果和减振理论，确定减振系统需要的系统固有频率和振动传递率，并据此进行隔振器的选型。通过试验对所选隔振器的减振性能进行了评估，验证了减振设计的可行性。