EA113汽油机的连杆有限元分析

佳木斯大学本科毕业论文（设计）AbstractConnecting Rod is an important power mechanism of engine,which takes on the importanttask of converting heat energy into mechanical energy,and is one of the key parts in the internalstructure of engine.The motion and force of the connecting Rod under normal operation areextremely complex,such as tensile and compressive stresses.Therefore,it is necessary to carryout modal analysis and static analysis to realize the optimum design of finite element.In thispaper,the EAl13 gasoline engine connecting rod is taken as the research object,through thedynamic calculation of the connecting Rod,the relevant specific size is obtained,then the 3Dmodel file is drawn,and then imported into the ANSYS finite element analysis software todivide the grid and pick up the whole element,on this basis,the static analysis and modalanalysis are carried out to achieve the optimal design,and then the related dimensions of theconnecting rod are optimized using ANSYS.Finally,the optimal design scheme of theconnecting Rod is obtained:The joint between the connecting rod body and the small end of theconnecting rod is optimized.The simulation results show that the size of the transition filletbetween the small end and the rod body can be optimized to improve the Factor of safety of theRod.The Factor of safety of the rod before optimization is 1.28,and the Factor of safety of theRod after optimization is 1.31,this is a 2.3%improvement over the original 3 D model of theconnecting rod and a 2.3%improvement in the service life of the Factor of safety.Key Words:connecting rod;static analysis;modal analysis;optimal design第Ⅱ页