The consistent mass matrix for the assembled element was derived to transform the dynamic equation to the generalized eigenvalues problem that can be solved using the inverse iterative method . moving frequency technique was also adopted in the calculation 本文還推導(dǎo)了組合單元的一致質(zhì)量陣,將動(dòng)力學(xué)方程轉(zhuǎn)化為廣義特征值問題,用逆迭代法求解,并在計(jì)算中采用“移頻”技術(shù),對(duì)潤(rùn)揚(yáng)懸索橋和青馬大橋進(jìn)行了振動(dòng)計(jì)算。