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电容器高频振动分析与结构优化

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针对非固体钽电容器高频振动环境下物理结构失效问题,利用COMSOL Multiphysics软件对其进行高频振动仿真分析。研究了钽电容器内部应力、应变在高频振动条件下的动态响应特性,分析其失效形式,并对其结构进行优化设计与实验验证。研究结果表明,振动过程中,钽电容器内部应力主要集中于阳极块、阳极引线、调整垫片三者接触处,最大应力随着振动加速度的提高而迅速上升,从而发生断裂失效。为提高电容器结构稳定性,设计一种新型爪式垫片结构。基于有限元分析与振动试验结果表明,优化后的钽电容器在高频振动环境下的工作可靠性得到了显著提高。

In allusion to the physical structure failure problem of non-solid tantalum capacitors in the high-frequency vibration environment,the high-frequency vibration simulation analysis is carried out by using the COMSOL Multiphysics software.The dynamic response features for internal stress and strain of the tantalum capacitor in the high-frequency vibration condition are researched.The failure mode of the capacitor is analyzed.The optimization design and experimental verification of the capacitor structure are conducted.The research results show that the internal stress of the tantalum capacitor is mainly concentrated at the contact point of the anode block,anode lead and adjusting gasket during the vibration process,and the maximum stress rises rapidly with the increase of the vibration acceleration,which can cause fracture failure.Therefore,a new claw-type gasket structure is designed to improve the structural reliability of the capacitor.The results of the finite element analysis and vibration test show that the operational reliability of the optimized tantalum capacitor in the high-frequency vibration environment is significantly improved.