Analysis of vibration characteristics of mounting plate for molded case circuit breaker

Abstract

This paper presents a framework to analyze the vibration characteristics of mounting plates for molded case circuit breakers (MCCB). Two different three-dimensional models for mounting plate I and II are established in ANSYS Workbench simulation platform through reasonable simplifications. The preceding six-order natural frequencies are obtained by means of modal analysis. Based on the experimental data of modal analysis, random vibration analysis of mounting panel I and II is conducted. It is concluded that mounting plate I is easy to deform permanently when its 3δ stress exceeds the yield limit of material, while mounting plate II meets the strength requirements and is better suited to test requirements.