一个结构响应分析程序，采用dmap编程，具体算法使用四阶龙格库塔算法riccati方法求解-a structural response analysis procedures using DMAP program, the specific algorithm used four bands Runge - Kutta method to solve algorithm Riccati

MSC.NASTRAN自带DMAP语言二次开发资料，有详细流程和例子-MSC.NASTRAN DMAP language