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基于雅可比旋量统计法的发动机三维公差分析

DOI: 10.3969/j.issn.1006-7043.201306058

Keywords: 雅可比旋量, 统计法, 三维公差分析, 做功机构, 发动机

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Abstract:

为了在发动机装配体的公差分析中考虑传统尺寸链无法处理的几何公差信息,以发动机的做功机构为分析对象,引入雅可比旋量模型,建立在尺寸和形位公差约束下的特征及其配合旋量的变动和约束方程。将其融入到蒙特卡洛算法中,实现发动机做功机构的三维统计公差分析。与传统分析方法相比,基于雅克比旋量模型的分析方法考虑了更多的几何公差信息,分析结果也更加精确,该模型可以从尺寸链角度建立发动机零部件公差与整机性能的映射关系。

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