Multidisciplinary design optimization for crank and connecting rod mechanism based on ISIGHT

WEI Lu-lu， ZUO Zheng-xing， XIANG Jian-hua
（School of Mechanical and Vehicular Engineering， Beijing Institute of Technology， Beijing 100081， China）

Abstract： Multidisciplinary design optimization（MDO） can compensate for the lack of traditional optimization，solve the problem of complex optimization and enhance the efficiency of design and optimization. In order to solve the MDO problem of crank and connecting rod mechanism，with comprehensive consideration of each discipline involved connecting rod and crank shaft，collaborative optimization was used， MDO model and the MDO platform based on ISIGHT was built. The results of research indicate that MDO method can realize the couple and high effect optimization of connecting rod and crank shaft，and the best results on both connecting rod and crank shaft are achieved，the mass and stress characteristic is improved.
Key words： crank and connecting rod mechanism； multidisiplinary design optimization（MDO）； ISIGHT