Dynamic Optimization of Engine Connecting Rod

To lightweight the engine connecting rod, and ensure it to meet the performance requirements, static equivalent load method was studied in the paper. Firstly, connecting rod stress distribution was analyzed. Then, multi-body dynamics model was established for the transient analysis, and connecting rod maximum stress was gotten when the engine working. Finally, using equivalent static load method, the dynamic load was converted to an equivalent static load. And as the boundary conditions, it was used to the optimization process to optimize the shape of connecting rod. The weight of lightweight connecting rod was reduced by 9.5%. Under the condition of satisfying the stress, the purpose of the connecting rod optimization was reached.