大规模动力系统高精度増维精细积分方法快速算法  

Fast algorithm for precise integration with high accuracy dimension expanding method with for large- scale dynamic systems

作　　者：吴泽艳[1] 王立峰[2] 武哲[1,2] 

机构地区：[1]清华大学航天航空学院,北京100084 [2]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《振动与冲击》2014年第2期188-192,共5页Journal of Vibration and Shock

摘　　要：考虑高精度増维精细积分法求解大规模动力系统快速算法。为提高増维精细积分方法求解大规模动力系统精度,将非齐次项近似为高阶多项式,形成高精度増维精细积分方法;为减少计算时间、提高计算效率,提出高精度増维精细积分方法快速算法。算例表明,通过提高非齐次项近似阶数可显著提高计算精度,快速算法可使计算效率呈量级提高,高精度快速算法适合大规模动力系统长时间推进计算。In order to improve the accuracy of precise integration with dimension expanding method for large scale dynamic systems, the non homogeneous items were approximated by high order polynomials. To reduce the time consuming of calculation, and improve the computational efficiency, a fast algorithm was derived. A numerical example shows that by increasing the approximate order of the non-homogeneous items, the computational accuracy and efficiency can be significantly improved. The algorithm is suited to the long time computation for large scale dynamic systems.

关 键 词：大规模动力系统 増维精细积分 高精度 快速算法 

分 类 号：O241.8[理学—计算数学]