1Analytical Prediction of Leaf Spring Bushing Loads Using MSC/NASTRAN and MDI/ADAMS

Analytical loads in leaf spring bushing can be used to perform finite element analysis on brackets that connect the leaf spring to a truck frame. Two models of leaf spring in MSC/NASTRAN and MDI/ADAMS were created to compare the bushing loads predicted by each model. Geometric non-linear capability of MSC/NASTRAN (SOL 106) was used to predict the bushing loads in MSC/NASTRAN model. The quasi-static simulation capability of MDI/ADAMS was used to predict the bushing loads in MDI/ADAMS model. The analyses simulated the standard jounce and roll tests at The University of Michigan Transportation Research Institute (UMTRI). An accurate prediction of loads in MSC/NASTRAN model provides the benefit of integration that allows us to include the leaf spring model in a full vehicle˝model to simulate full vehicle lab tests as well as proving ground durability events. Good correlation was obtained between the two models in jounce condition. More effort is underway to establish satisfactory correlation for roll condition