铰接装油塔的非线性动力分析

Nonlinear Dynamic Analysis of Articulated Loading Tower

本文应用非线性谱分析法,对铰接装油塔在随机海浪作用下的非线性动力响应进行了分析。系统的非线性来源于系统的非线性恢复系数。研究表明,当系统的位移较小时,线性解可以给出较好的近似解,但线性解的误差随位移的增大而增大。因此,在大位移条件下,应当考虑系统的非线性效应,以提高计算结果的精度。

The nonlinear dynamic response of an articulated loading tower under the action of random sea waves is carried out by means of nonlinear spectral analysis. The nonlinear of the system comes from the resume coefficient of the system. The study indicates that when the displacement is small, the linear solution can give reasonable approximation, but when the dis-placement becomes large enough, the errors of linear solution increase significantly. Therefore , the nonlinear effect due to large displacement should be taken into consideration in order to get more accurate results.