anharmonic term

It is easily ignored perturbation due to tesseral harmonic terms that will be discussed in this paper.

讨论了容易被忽视的田谐项摄动 ,尽管它对低轨卫星的影响 ,只相当于J2 项的二阶量 ,又是短周期效应 ,但它却包含了大 1 0多倍的地球自转项 ,必须给以重视 。

Two harmonics method is presented for strongly nonlinear dynamic-system.

提出一类强非线性动力系统的两项谐波法,将描述动力系统的二阶常微分方程,化为以频率、振幅为变量的非线性代数方程组,考虑初始条件补充约束方程,构成频率、振幅为变量的封闭非线性代数方程组。

Strongly nonlinear problems are difficult to solve by classical procedures such as perturbation methods,and two harmonics method is presented for them.

提出了一类强非线性动力系统的两项谐波法,采用Ritz-Galerkin法,将描述动力系统的二阶常微分方程,化为以频率、振幅为变量的非线性代数方程组,考虑初始条件补充约束方程,构成频率、振幅为变量的封闭非线性代数方程组。