Analysis on impact resistance of reed contact switch for naval ships

  Objectives   As an important component of the connecting circuit, the reed contact switch has been widely used in the electrical system of the naval ship. The switch is very sensitive to underwater non-contact explosion impact, and thus once damaged, it may lead to the failure of the electrical system. This paper studies the impact resistance of the reed contact switch in order to determine its critical working conditions.

  Methods   To this end, this paper employs the finite element method to simulate the impact process, and analyzes the response characteristics of different frequency bands based on the critical acceleration amplitude of the corresponding band derived from the triangular wave impact load of certain band applied to the switch model.

  Results   The results show that the switch contact will be separated once the shock spectrum of the excitation force at a fixed point exceeds the allowable value. Thus, the preload should be increased to improve the impact resistance of the switch.

  Conclusions   This study provides the basis for the research on the damage modes and the protection of the electrical switches of naval ships.