舰船电器设备中簧片式触点开关的冲击破坏潜能分析

摘要

对处于闭合状态的簧片式触点开关进行了接触模态分析,确定固有频率和振型;保证最大加速度响应、伪速度响应、最大位移响应中两者不变,设计不同正负双波时域冲击载荷,对簧片式触点开关进行有限元冲击模拟.动、静触头之间的接触力以及簧片根部应力在自由振动时呈现出周期性,接近一阶固有频率;最大加速度响应只影响触头间的接触压力,对于簧片的根部应力不能产生影响;伪速度响应只影响簧片根部的应力,而不能影响触头间的接触压力;最大位移响应的改变不能影响簧片的抗冲击性能.%The contact modes of closed switch are firstly analyzed to get the natural frequency and modes.The different positive and negative dual wave loads are designed to ensure the two variables of maximum pseudo velocity,acceleration and displacement be equal by using the finite element software to simulate the shock impact of the reed contact switch.The contact pressure and the root stress of the reed switch vibrate periodicity closed to the first-order natural frequency when the shocking stopped;the maximum acceleration response just affects the contact pressure but has no effects on root stress;the pseudo velocity response just affects the root stress but has no effects on contact pressure;the maximum displacement response has no effects on contact pressure or root stress.