非线性振动

Then we use above mentioned theory to study degenerate bifurcations of codimension two in nonlinear oscillator under combined parame-tric and forcing excitation. Thereby stability problems with double zero eigenvalues can be solved.

然后利用上述理论研究了参数激励与强迫激励联合作用下非线性振动系统的余维2退化分叉，从而解决了当解具有两个零特征值时解的稳定性问题。

The mechanisms are chosen based on the experimentally observed dynamic characteristics of the kind dashpot behavior and analyzing the experimental data for the kind dashpot.

用所建模型重构恢复力――位移迟滞环，结果表明，该模型能很好描述这类非线性振动系统的特性，模型中各参数的重要性得到展示，提出的建模方法实用且有效。

Random parameters ; multi degree of freedom nonlinear vibration systems ; reliability ; statistical fourth moment method ; Edgeworth series

随机参数；多自由度非线性振动系统；可靠度；四阶矩技术； Edgeworth级数

Above all this promotes the development of the problem of dynamic soil-structure interaction. The study of dynamic interaction of foundations and soils is of great value to the development of the elastodynamics and is helpful to physical geography, seismography, and rock and soil mechanics, owning practical.

土体与结构的相互作用是当代力学领域的前沿性研究课题，并涉及到土动力学、结构动力学、非线性振动理论、地震工程学、岩土及结构抗震工程学、计算力学及计算机技术等众多学科。

Taking temperature variation into account, nonlinear vibration of elliptic paraboloid cable net made of carbon fiber cables was investigated under excitation of main structure displacement.

在考虑温度变化的基础上，研究椭圆平面双曲抛物面碳纤维索网在主体结构激励下的非线性振动问题。

The insurmountable difficulties of traditional control strategy in isolating vertical vibration and controlling micro-oscillation may be overcome by employing magnetic levitation technique.As a fundamental research of this technology,the governing equitation of rigid uniformity magnetic suspension pole is derived.

采用磁悬浮技术可以解决传统控制方法在竖向隔震、微振控制等方面所面临的难题，作为这项技术应用基础研究，本文建立了磁悬浮均匀等直刚杆的运动方程，讨论了方程的稳定性，给出了随机地面扰动输入下求解非线性振动解的Runge-Kutta格式，并对悬浮刚杆在任意输入下的响应进行了分析。

By applying the method of multiple scales to the reduced system,the first approximation solution for 1/3 subharmonic resonance of the system is obtained.

应用非线性振动的多尺度法求得系统满足1/3次亚谐共振情况时的一次近似解，并进行数值计算。

By applying the method of multiple scales to the reduced system,the first approximation solution for 1/3 subharmonic resonanc...

应用非线性振动的多尺度法求得系统满足1/3次亚谐共振情况时的一次近似解，并进行数值计算。

First of all, the method of Fredholm alternative is used to obtain the approximate solution of the first order for the bifurcating periodic solutions of a nonlinear system with delayed velocity feedback. The bifurcation direction and the stability of the bifurcating periodic solution are also determined.

首先，用Fredholm择一方法分析了一具有时滞速度反馈的非线性振动系统的Hopf分叉，得到了局部分叉周期解的近似表达式，确定了分叉解的分叉方向及稳定性。

Based Hamilton principle and Galerkin method, the equations of nonlinear vibration of SMA damper-cable system have been set up.

根据Hamilton原理，结合Galerkin法，建立了SMA阻尼器—拉索系统的非线性振动方程。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。