Transient Strensith Analysis of Engine Block

Facing the complicacies of an engine block and the fact that it is subjected to multiform dynamic loads during the engine working, this paper builds a detail transient strength explicit finite element (analysis) model, to simulate the block's dynamic variation during the engine working. It results that the overall stress level of the areas near the binding blots connecting engine block, engine cylinder head and the transmission are the highest, but its fluctuation with the engine load are smaller; the dynamic stress and distortion close to the main bearing housing are higher, and their fluctuation with the engine loads is greater; the dynamic and static stress and distortion of the block sidewall are almost of the same proportion. Further the studies indicate that the reasonable modeling of the block's geometrical construction and correct determination of the interaction of piston and crankshaft to engine block can make the transient strength analysis more accurate and offer some reliable suggestions for the dynamic strength design of engine block.