Study of Crankshaft Strength Based on iSIGHT Platform and DOE Methods

At the design process, the determination of the Crankshaft key structural parameters, the causes of fatigue changes, is important. Based on the multi-disciplinary collaborative design optimization platform, combining the finite element analysis, variable structure parameters of the design and the design of experiment, this paper sets up the automatic solving model which integrates the parameters geometric module, finite element analysis module, numerical calculation module. Then the sample matrix is set up by Latin hypercube sampling method. The sensitivity analysis, the main effect analysis and the interaction analysis of the key structural parameters on crankshaft fatigue strength are accomplished. The results show that the crankshaft fillet radius has the greatest influence on the crankshaft strength and the crank radius has less influence on the crankshaft strength.