Multi-body dynamic stress analysis of a crankshaft for V8 engine

Abstract

Comprehensive, accurate and inexpensive way of analyzing a crankshaft in terms of stress has been suggested. Putting deformable crankshaft in analysis, this method takes into account torsional vibration, journal bearing and gas pressure simultaneously giving transient stress values. In opposition to various precedential approaches, the method doesn’t require separate rigid body dynamic analysis and stress analysis. In other words, one single multi-body dynamic analysis including crankshaft, piston, flywheel and torsional damper gives comprehensive stress values considering most of key factors influencing crankshaft stress. As additional results, main bearing reaction forces and journal center orbts were also investigated. A crankshaft for V8 heavy-duty diesel engine was analyzed and evaluated by suggested method.