CAE Analysis Of Crankshaft And Connecting Rod Mechanism For Motorcycle Engine

The crankshaft and connecting rod mechanism in a engine are high-speed rotating components, the movement of the institutions is one of the main reasons about vibration of the engine, Organizations are affected by the role of alternating load. The alternating stress of some parts will reach a very high value, easy to have the fatigue failure.If only considers each component as the rigid body in the simulation process,then can not accurately simulate the work of agencies. In this paper, the three-dimensional solid model of the institutions in JS183MQ engine has been established by using three-dimensional mapping software UG, and the coupled model of the rigid body and flexible body in the crankshaft connecting rod mechanism has been established by using finite element analysis software MSC.Patran/Nastran and mechanical system dynamics simulation software MSC.Adams, and the dynamic stress of the crankshaft and connecting rod through dynamics simulation has been achieved. The site of fatigue failure has been pointed out in the S-N analysis of institutions by using professional fatigue analysis software, and the results of this analysis can be referenced for the design of the crankshaft connecting rod mechanism.Pistons stands the great thermal load and mechanical load, thermal load and intensity of piston have greatly affected the durability and reliability of engine. A quarter of the coupling model about Piston and piston pin has been built in this paper, and the temperature field of piston has been simulated, and corresponding measures for improvement has been made after having analysised the thermal stress and mechanical stress and coupling stress.