摘要
以圆柱壳的Hamilton正则方程为基础,推导了受弹性约束的双层圆柱壳的耦合方程,并将其应用于大型发电机定子系统的振动特性分析。分析方法是半解析法,没有应力和位移模式的假设,不限制壳的厚度,不要求两壳间的连接弹簧或其它支撑弹簧均匀分布;该方法象一般有限元方法一样适应复杂的边界条件和由多种材料构成的结构,未知量少,计算速度快,数据准备方便,适合工程应用。
With the Hamilton canonical equation of cylindrical shells, the coupling equation of an elastically constrained circular cylindrical double-shell system is derived. It is employed to analyze the vibration behavior of a large generator stator system. A semi-analytical method with no assumption of stress and displacement is developed, in which the thickness of shell is not restricted and the uniform distribution of springs is not needed. Like the general finite element method (FEM), the present approach can deal with complex boundary conditions and structures made of multiple materials. With less unknown quantities than that of general FEM and convenient data preparation, the present approach exhibits fast calculation speed. Therefore, it suits for engineering practices.
出处
《工程力学》
EI
CSCD
北大核心
2004年第2期101-106,共6页
Engineering Mechanics
基金
国家自然科学基金(10072038)
教育部博士点基金(2000005616)资助项目
关键词
固有频率
定子系统
耦合方程
双壳耦合结构
Boundary conditions
Electric generators
Equations of motion
Finite element method
Natural frequencies
Shells (structures)
Vibrations (mechanical)
