| Accurately analyzing mode,strength,stiffness and fatigue of mechanical parts in the designphase，can shorten product development times obviously.Finite element theory,the multi-bodydynamics theory and the fatigue theory provide an dvanced mean for automobile parts，through analyzing the virtual model of the automobile parts,you can find the designingproblems in the design phase.Doing like this not only greatly shorten the development times,but also save the research and development expenditures.In this paper, based on the true size of the WD615Diesel engine,firstly,thethree-dimensional geometric model of connecting rod,crankshaft,piston had been establishedby using three-dimensional graphics software CATIA,then rigid body of the crankshaft systemwere established in the multi-body dynamics software Adams;using finite element analysissoftware MSC.Patran/Nastran,get the mode neutral files of the connecting rod,crankshaft toreplace the rigid body crankshaft,connecting rod, rigid-flexible hybrid of the crankshaftsystem model was established;make modal stress recovery on the crankshaft,connecting rodand obtained time-load history for life-cycle fatigue analysis. The1ife distribution of thecrankshaft system and the fatigue1ives of the most damaged points are obtained.The resultsare valid to evaluate crank-link system fatigue1ife in products design stage conveniently．... |
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