Structural Optimization of Contact Springs of Electrical Connectors

• Main Authors: Yu Sun Po, 余孫博
• Other Authors: Chen, K N
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/17505024183824112154

碩士 === 東南科技大學 === 機電整合研究所 === 97 === Abstract This research incorporated the finite element method and response surface methodology to investigate the optimum shape design for the contact springs of electrical connectors using multiple geometrical control points as the design variables. Finite element contact analysis employs a nonpenetration condition between two contact surfaces to avoid penetration. This thesis studied the structural optimization problem for contact springs and sought to minimize the maximum von Mises stress occurred when the contact springs were engaged with contact plates. A two-staged design process was utilized to conduct the research, which included experimental design using the faced center central composite design, non-linear contact finite element analysis on every design point, regression analysis to response surface model, and optimization on the approximated model using the quadratic programming technique. Meanwhile, during the optimization procedure, design space reduction scheme was adopted to improve the accuracy. Finally, simulation of a contact plate approaching and moved away the contact spring was realized to examine the relation between the normal contact force in the contact spring and the traveling distance of the rigid contact plate. The results have shown that a pressed down distance of 1.5 mm was enough to yield a permanent deformation on the contact spring.