摘要
巨型框架多功能减振结构的结构复杂、规模庞大,并且它是由具有不同阻尼特性的材料组成的。因此,采用有限元方法进行计算时面临着一系列问题需要解决。针对巨型框架多功能减振结构的受力特性,给出了巨型框架多功能减振结构的三维简化计算模型,大大缩减了计算自由度。由于隔震橡胶垫的变形主要是水平剪切变形,因此,将隔震橡胶垫看做具有阻尼特性的三维弹性或弹塑性铰,并提出了隔震橡胶垫单元的三维单元模型。由于巨型框架多功能减振结构的非经典阻尼特性,可以采用子结构技术对巨型框架多功能减振结构进行有限元建模、计算。
The multifunctional vibration-absorption megaframe structures, which are composed of parts with different damping coefficients, are complicated and large-scale systems. Problems arise when the finite element method is adopted to analyze the systems. Considering the performance of the system under dynamic loads, a simplified three-dimensional finite element model, in which the degrees of freedom were condensed, was presented. The main deformation of the laminated rubber bearings (LRBs) was the horizontal shear deformation; therefore a LRB was regarded as a three-dimensional elastic or elastoplastic hinge with damping character and a three-dimensional finite element model of the LRB was presented. The substructure technique was adopted to analyze the multifunctional vibration-absorption megaframe structures.
出处
《工程力学》
EI
CSCD
北大核心
2004年第3期118-122,共5页
Engineering Mechanics
基金
国家自然科学基金资助项目(59778040)
关键词
巨型框架
结构控制
有限元方法
橡胶垫单元
子结构建模
Absorption
Bearings (structural)
Damping
Elastoplasticity
Finite element method
Three dimensional
Vibrations (mechanical)
