摘要
提出一种用于结构地震反应分析的并行计算方法,此方法将被分析的整体结构划分为多个子结构进行并行计算,计算中考虑子结构间的相互作用。此系统中的核心是协调器,用于保证各子结构边界处的变形协调与力平衡。协调器基于柯西-牛顿迭代算法,通过修正边界处的不平衡力与刚度矩阵得到精确的位移数值解。此方法的特点是各子结构完全独立,相互之间只通过标准数据输入与输出接口传递力与位移。以一个包括四个塔楼的复杂结构为例验证了此方法的有效性。该复杂结构被划分为4个子结构进行并行计算,分析结果表明该并行计算方法对于动力弹性时程分析问题可以得到与整体分析一致的解,对于动力弹塑性时程分析问题,当步长足够小的时候,可得到具有足够精度的解。
A novel parallel computing method for structural seismic response analysis is proposed. In the method, the simulated structure is divided into multiple substructures, and the interaction between the substructures is considered. The core of the system is ＇Coordinator＇, which is used to achieve compatibility and equilibrium at boundaries. ＇Coordinator＇ is equipped with an iterative algorithm based on Quasi-Newton iterations. Each substructure is treated as an independent system and only standard I/0 i.e. displacements and forces at the boundaries, are used as interfaces. The seismic response of a large structural system having four towers is analyzed using the method, and the effectiveness and accuracy of the system is verified.
出处
《工程力学》
EI
CSCD
北大核心
2013年第5期118-124,共7页
Engineering Mechanics
基金
清华大学自主科研项目(2010Z01001)
国家自然科学基金项目(51178250
51178249
51261120377)
北京市教委科技计划重点项目(KZ201110005009)
关键词
结构地震反应分析
子结构技术
并行计算
柯西-牛顿迭代法
有限元
seismic response analysis
substructure technique
parallel computing
quasi-newton iteration
finite element method
