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3D finite element analysis on crankshaft fatigue life-span

HE Bing, ZHENG Changjiang, AI Gang(711th Research Institute, China Shipbuilding Industry Corp., Shanghai 200011, China)  
With the numerous factors that affect crankshaft fatigue life-span and its difficulty of accurate estimation, a power device assembled by a certain type of diesel engine is taken as original model. The dynamic stress of crankshaft is calculated by 3D finite element mode analysis. The fatigue life-span of crankshaft is analyzed by dynamic stress load spectrum. The experiment compares the crankshaft life-span under different cases and shows that the relative value is very stable.
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