摘要
为改善发动机连杆在热-结构耦合作用下的性能,首先,应用理论分析法分析了发动机曲柄连杆机构的运动学特性;然后,采用有限元仿真法分析了连杆在热-结构耦合作用下的拉应力、压应力以及疲劳寿命;最后,依据仿真分析结果对原型连杆的危险截面进行优化设计并再次分析,结果表明,优化后的发动机连杆其应力得到大幅减小,但疲劳寿命增加了96.60%,连杆性能得到了很好的改善。
In order to improve the performance of engine connecting rod under thermal-structural coupling,the theoretical analysis method is applied to analyze the kinematic characteristics of engine crank connecting rod mechanism as the first step.Then,the tensile stress,compressive stress and fatigue life of the connecting rod under thermal-structural coupling are analyzed with finite element simulation.Finally,the dangerous section of the prototype connecting rod is optimized and reanalyzed according to the simulation results.The results show that the stress of the optimized engine connecting rod has been greatly reduced,but the fatigue life has been increased by 96.60%,and its performance has been significantly improved.
作者
李晓婧
张颖博
高欣
LI Xiao-jing;ZHANG Ying-bo;GAO Xin(Department of Transportation and Vehicle Engineering,Tangshan University,Tangshan 063000,China;Key Lab of Intelligent Equipment Digital Design and Process Simulation of Hebei Province,Tangshan University,Tangshan 063000,China;Fuxin Dare Automotive Parts Co.,Ltd.,Fuxin 123000,China)
出处
《唐山学院学报》
2021年第6期23-27,共5页
Journal of Tangshan University
基金
唐山学院博士创新基金(1401901)
辽宁省自然科学基金(20180550880)。
关键词
发动机连杆
热-结构耦合
应力
疲劳寿命
优化设计
connecting rod
thermal-structural coupling
stress
fatigue life
optimization design
