车桥耦合系统动力响应的精细时程分析
|
摘要
为了研究车桥耦合系统的动力响应,首先将普通精细时程积分法进行改进;即将车辆荷载和车辆惯性力以"渐进"的方式加载到整个系统上。然后通过数值实例,编写MATLABT通用计算程序求解,得到运用改进时程法在积分步长较大情况下能得到较精确的结果。最后对计算精度和计算时间进行研究,得到积分步长对计算时间影响较大,积分间隔对计算精度的影响较大,所以在使用改进的精细积分计算式一般选取较大的积分步长和较小的积分间隔。
In order to study the dynamic response of the train-bridge coupling system,the ordinary PIM(Precise Integration Method) is improved and generalized that put vehicle load and vehicle inertial force to the whole system with "progressive" method.Then an example by MATLAB is calculated,it is shown that the extended PIM has satisfactory precision when the integral step is large.At last study the calculational accuracy and computational time,integral step has more influence is got on computational time than integral interval,but integral interval has more influence on computational accuracy than integral step,so larger integral step land smaller integral interval when use PIM is generally choosed.
In order to study the dynamic response of the train-bridge coupling system,the ordinary PIM(Precise Integration Method) is improved and generalized that put vehicle load and vehicle inertial force to the whole system with "progressive" method.Then an example by MATLAB is calculated,it is shown that the extended PIM has satisfactory precision when the integral step is large.At last study the calculational accuracy and computational time,integral step has more influence is got on computational time than integral interval,but integral interval has more influence on computational accuracy than integral step,so larger integral step land smaller integral interval when use PIM is generally choosed.
引文
1何万龙,任伟新,吴建基.柔性梁上高速移动的质量动力响应分析.振动与冲击,1998;17(1):67-72
2王少钦,夏禾,郭微微,等.变速移动荷载作用下简支梁桥的动力响应及共振分析.振动与冲击,2010;29(2):26-30
3彭献,刘子建,洪家旺.匀变速移动质量与简支梁耦合统的振动分析.工程力学,2006;23(6):25-30
4肖新标,沈火明.移动荷载速度对简支梁动态响应的影响.西南交通大学学报,2002;37(s1):35-39
5张亚辉,张守云,赵岩,等.桥梁受移动荷载动力响应一种精细积分法.计算力学学报,2006;23(3):290-295
6钟万勰.应用力学对偶体系.北京:科学出版社,2002
7汪梦甫,周锡元.结构动力方程的更新精细积分方法.力学学报,2004;36(2):191-195
8申永康,邵建华,陈建锋.建筑结构爆破地震反应弹塑性精细时程分析.爆炸与冲击,2008;28(1):92-96
9李金桥,于建华.基于精细积分的结构主动最优控制算法.西南交通大学学报,2004;39(1):77-81
2王少钦,夏禾,郭微微,等.变速移动荷载作用下简支梁桥的动力响应及共振分析.振动与冲击,2010;29(2):26-30
3彭献,刘子建,洪家旺.匀变速移动质量与简支梁耦合统的振动分析.工程力学,2006;23(6):25-30
4肖新标,沈火明.移动荷载速度对简支梁动态响应的影响.西南交通大学学报,2002;37(s1):35-39
5张亚辉,张守云,赵岩,等.桥梁受移动荷载动力响应一种精细积分法.计算力学学报,2006;23(3):290-295
6钟万勰.应用力学对偶体系.北京:科学出版社,2002
7汪梦甫,周锡元.结构动力方程的更新精细积分方法.力学学报,2004;36(2):191-195
8申永康,邵建华,陈建锋.建筑结构爆破地震反应弹塑性精细时程分析.爆炸与冲击,2008;28(1):92-96
9李金桥,于建华.基于精细积分的结构主动最优控制算法.西南交通大学学报,2004;39(1):77-81
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心