After carrying out a theoretical analysis of vibration and sound radiation of mill cylinder, simulation for acoustic field has been preceded by boundary element method.

本文对球磨机筒体的振动和声辐射进行了理论分析，然后结合边界元方法对筒体辐射声场进行了仿真分析。

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The screwdown block is improved by mechanics analysis with boundary element method, and a simple device is designed for dynamic load of oil film bearing used in high-speed wire rolling mill.

通过采用边界元法对高线轧机压下垫块改造模型进行力学分析，开发设计一种适合测量高线轧机油膜轴承动态载荷特性的简易装置。

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