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基于ANSYS Workbench仿真计算平台,笔者建立了柴油机曲轴的有限元分析模型,计算了柴油机曲轴在静止受压状态下的应力场分布,完成了有限元模型的校核。采用试验设计方法(Design Of Experimentsmethod,DOE),将曲轴壁厚、主轴颈长度、曲柄销长度、连杆轴颈过渡圆角半径及主轴颈过渡圆角半径作为输入参数,曲轴质量及最大应力作为输出参数,完成了柴油机曲轴的多目标优化。优化后曲轴质量和最大应力均有所降低,从而改善了曲轴的质量和应力特性。
Based on the ANSYS Workbench simulation platform, the author established the finite element model of the diesel engine crankshaft, calculated the distribution of stress field of the diesel engine crankshaft under static compression and completed the checking of the finite element model. Using Design Of Experiments method (DOE), the crankshaft wall thickness, main journal length, crankpin length, connecting rod journal fillet radius and main journal fillet radius are taken as input parameters, crankshaft mass and maximum stress are taken as Output parameters, the completion of the diesel engine crankshaft multi-objective optimization. Optimized crankshaft quality and maximum stress are reduced, thus improving the crankshaft quality and stress characteristics.