短語詞組短語changing stiffness control method 變剛度控制方法modified stiffness matrix method 脩正剛度矩陣法recursive stiffness matrix method 遞歸剛度矩陣法ground stiffness softening method 剛度軟化法Dynamic Stiffness Matrix Method 剛度陣法stiffness derivative method 剛度導(dǎo)數(shù)法tangent stiffness iterative method 切線剛度疊代法stiffness degeneration method 剛度退化法variable stiffness spring method 變剛度彈簧法 返回 stiffness method