摘要
该文针对动力松弛法中阻尼参数的取值提出了简便计算方法,通过算例分析,证实了提出的阻尼计算方法和结构的临界阻尼相接近。针对建筑师对膜面造型的变化要求,对动力松弛法进行改进:根据对典型马鞍面的轮廓分析,以改变膜曲面造型为目标,通过引入函数f(L)=(d/L)^α修正了动力松弛法中节点刚度的取值。改进后的动力松弛法可以依据建筑师的不同要求,通过调整参数α来得到不同的不等应力膜面,大大扩展了经典动力松弛法的适用范围。
Dynamic relaxation method is modified in two aspects: 1) Simple procedure to gain the damp value directly, which is close to that of the critical damp, as verified by examples. 2) Extended applicable range to meet the architects' expectation of more shapes. In analyzing the HP-type membrane, function f(L)=(d/L)^α is introduced to modify the node stiffness. Then the shape of membrane is adjusted by changing parameter α. Finally, the desired membrane shapes are obtained. In this way, the application of the classic dynamic relaxation method is extended.
出处
《工程力学》
EI
CSCD
北大核心
2008年第12期194-201,共8页
Engineering Mechanics
基金
江苏省"六大人才高峰"基金项目(建筑B类)
关键词
索膜结构
找形方法
动力松弛法
算法改进
找形分析
membrane structure
form fmding method
dynamic relaxation method
improved algorithm
formfinding analysis