【摘要】 阐述了机械多体系统动力学对模型的要求,根据这些要求提出了基于CAD的动力学参数模型获取的思路——在三维模型和分析模型之间建立一个属性提取层,并由此给出了在国产三维CAD软件CAXA中的实现方案;然后详细研究了如何在CAXA中进行动力学参数的获取和定义,给出了以数据库为基础的多体系统模型及其组件:刚体、约束等参数获取和定义;最后给出了一个具体的实例。更多还原

【Abstract】 An introduction about mechanical multibody system’s requirements of model is provided, then the idea on abstraction of dynamic data model based on CAD is present according to the requirements, that is setting up a data abstraction layer between 3D model and analytical model, and the method of realization in national CAD product—CAXA is given; Then abstraction and definition of dynamic data in CAXA are discussed in detail, and the multibody system model and its’ components based on database are present, such as data abstraction and definition on rigid body, constraint, et al.; At last a specific example is provided.更多还原