3-D solid models of the cylinder cover and the relevant parts are established and on this basis

static 3-D finite element analytical model is also established. The stress value of the 150 diesel cylinder cover is calculated at the pre-fixing and the outbreak working situation

and correctness of results is testified by the experiments

this cylinder cover is analyzed according to calculated results. Calculated results are accurate by use of this analytical finite element(FEM) method. Calculated data offers the basis for analyzing the rupture reason of cylinder cover.