This paper aims to develop a theoretical method to analyze the rotation accuracy of rotating machinery with multi-support structures. The method effectively considers the geometric errors and assembly deformation of parts.,A method composed of matrix and FEA methods is proposed to do the analysis. The deviation propagation analysis results and external loads are set as boundary conditions of the model which is built with Timoshenko beam elements to calculate the spatial pose of the rotor. The calculation is performed repeatedly as the rotation angle increased to get the rotation trajectories of concerned nodes, and further evaluation is done to get the rotation accuracy. Additionally, to get more reliable results, the bearing motion errors and stiffness are analyzed by a static model considering manufacturing errors of parts.,The feasibility of the proposed method is verified through a case study of a high-precision spindle. The method reasonably predicts the rotation accuracy of the spindle.,For rotating machinery with multi-support structures, the paper proposes a modeling method to predict the rotation accuracy, simultaneously considering geometric errors and assembly deformation of parts. This would improve the accuracy of tolerance analysis.

中文翻译：

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考虑几何误差和零件变形的多支撑旋转机械旋转精度建模

本文旨在开发一种理论方法来分析具有多支撑结构的旋转机械的旋转精度。该方法有效地考虑了零件的几何误差和装配变形。提出了一种矩阵法和有限元法相结合的方法进行分析。将偏差传播分析结果和外载荷作为用铁木辛柯梁单元建立的模型的边界条件，计算转子的空间位姿。随着旋转角度的增加，重复计算得到相关节点的旋转轨迹，并进一步评估得到旋转精度。此外，为了获得更可靠的结果，轴承运动误差和刚度通过考虑零件制造误差的静态模型进行分析。通过高精度主轴的案例研究验证了所提出方法的可行性。该方法合理预测了主轴的旋转精度。,针对多支撑结构的旋转机械,提出了一种同时考虑零件几何误差和装配变形的旋转精度预测建模方法。这将提高公差分析的准确性。