船用柴油机机体主轴承孔镗削加工残余应力预测

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关键词：船用柴油机机体；镗削加工；残余应力；有限元仿真

中图分类号：TH142；TG53

DOI：10.3969/j.issn.1004-132X.2025.08.023 开放科学（资源服务）标识码（OSID）：

Abstract：As a critical structural element of the engine body，the main bearing hole directly affcted the engine's overallperformances and long-term reliability.For predicting residual stress，methods combining finite element simulation，response surface modeling，and machining experiments were utilized to explore how machining parameters affected surface residual stress，culminating in the determination of cutting parameters focused on minimizing these stresses.The results show that the established three-dimensional simulation model for machining surface residual stress in the main bearing hole correlates well with actual surface residual stress and the predictions of the response surface model. The response surface model achieves higher prediction accuracy than the finite element model， improving the average prediction error from 15.6% to 2.5% . Optimal cutting parameters may reduce machining-induced residual stress significantly， decreasing surface residual stress by 50.6% ， cutting residual stress by 53.6% ， and feed-induced residual stress by 46.2% ：

Key words：marine diesel engine body；boring；residual stress； finite element simulation

0 引言

船舶及其配套设备产业在全球经济体系中占据着不可或缺的地位。（剩余14046字）