舰艇电气设备中簧片式触点开关冲击响应分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (1) : 183-187.

论文

闫明1, 2，刘栋1, 2，张磊2，温肇东2

作者信息 +

Shock Response Analysis of the Reed Contact Switch in Naval Ships' Electrical Equipment

YAN Ming 1,2 Liu Dong1, 2 ZHANG Lei 2 WEN Zhaodong 2

Author information +

文章历史 +

摘要

簧片式触点开关广泛应用于舰艇的电气设备中。舰艇受到爆炸冲击时，簧片式触点开关易发生断路或簧片产生塑性变形，影响设备的可靠性，危害舰艇的安全。为了校核簧片式触点开关的抗冲击能力，首先对处于闭合状态的簧片式触点开关进行接触模态分析，然后对其施加多种典型冲击载荷并采用Bathe复合积分法开展计算，最后通过提取动、静触头之间的接触力来判断簧片式触点开关是否发生断路，同时观察簧片根部在冲击载荷下是否发生塑性变形。研究发现：动、静触头之间的接触力在冲击载荷作用时波动剧烈，而在自由振动时则呈现出明显的周期性，且振动频率接近一阶固有频率；在幅值相同的情况下，高频冲击载荷更容易诱发剧烈的接触颤振而断路，低频冲击载荷会使簧片根部的应力较大而塑性变形。讨论了负波延迟对冲击响应的影响，提出了改善簧片式触点开关抗冲击能力的措施。

Abstract

Reed contact switch is widely used in the naval ships' electrical equipment. When subjected to explosive impact, the reed contact switch tends to open or the reeds produce plastic deformation, which affects the reliability of the equipment and endangers the safety of the ship. To check the shock resistance of the reed contact switch, contact modes of the closed switch are analyzed firstly, and then the response under several typical impact loads is calculated with Bathe composite method. Finally, whether the reed contact switch occurs open circuit is determined by extraction of the contact force between the dynamic contactor and the static contactor, while whether the reeds are plastically deformed under impact loading is observed. The study shows that the contact force between contactors volatiles during impact loading while it shows a clear periodicity in the free vibration with the vibration frequency approaching the first-order natural frequency; In the case of the same amplitude, high frequency impact loads are more likely to cause violent contact chatter and broken circuit, while low frequency impact loads make the larger stress and plastic deformation of the root of reeds. Influence of negative wave delay to shock response is discussed, and measures to improve the reed contact switch to shock resistance is proposed.

导出引用

闫明1, 2，刘栋1, 2，张磊2，温肇东2. 舰艇电气设备中簧片式触点开关冲击响应分析[J]. 振动与冲击, 2016, 35(1): 183-187

YAN Ming 1,2 Liu Dong1, 2 ZHANG Lei 2 WEN Zhaodong 2. Shock Response Analysis of the Reed Contact Switch in Naval Ships' Electrical Equipment[J]. Journal of Vibration and Shock, 2016, 35(1): 183-187

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