非线性振动

It includes the undertermined fundamental frequency approaching zero and the collision of the periodic orbit with the saddle point.

然后分别依据系统的待定固有频率趋于零和周期轨道趋近于鞍点两条途径获得了强非线性振动条件下系统同宿分岔的解析判据。

In this paper, an orthogonal function method is presented based on the idea to suppose periodic solution with the method of harmonic balance.

本文根据谐波平衡法假设周期解的基本思想，提出了一种分析非线性振动特性的正交函数法。

Comparisons between the interval analysis method and the probability perturbation finite element method in mathematical proof and numerical examples are performed, which show the advantages of the presented method, including less prior information need on uncertain parameters and higher accuracy.

从数学证明和数值算例两方面，将其与概率摄动有限元法进行了比较，结果显示区间分析方法对不确定参数先验信息具有要求较少、精度较高的优点。关键词动力响应，非线性振动系统，区间分析方法，概率摄动有限元法，不确定参数

The governing equation is further reduced into an ordinary nonlinear differential equation by Galerkin's method.

利用Galerkin方法将其转化为非线性振动方程。

Then the problem is reduced to less degrees of freedom to solve nonlinear equations by the modal synthesis method.To verify the successfulness of this method,an example is given.

利用非线性振动理论的平均方法，求得经模态综合法降维后系统方程的近似解析解。

3 Superharmonic resonance of wire subjected to harmonic excitation in temperature field is studied.

研究输电线在温度场中谐扰力作用下的3次超谐共振问题，应用动力学方法建立温度场中受谐扰力作用输电线的非线性振动。

With this interface, the setting of initial conditions, the combination of arbitrary parameters, the geometrical display of power spectrums, trochoid chart of phase portraits, Poincare mapping, analogous dynamic graph of displacements and the analogous vibration graph of mass blocks can be realized in an interactive way.

通过该可视化分析模型可以对非线性振动系统的混沌动力特性等进行全面地研究。该可视化分析模型具有操作简单、可视化程度高、可变参数调节方便、计算机仿真准确和分析问题全面等优点。

Analysis of dynamics of nonlinear Duffing-van der Pole oscillator using versal models.

一类非线性振动系统混沌运动的数值分析。国外建材科技，2005，26(1)：55～57。

The frequency method of identifying parameters of weakly nonlinear vibrating system is presented in this paper.

本文提出了一种识别弱非线性振动系统参数的方法。

Singing behavior; higher vocal center; caudal nucleus; ventral hyperstriatum; hippocampus; song-control nucleus; song nuclei; area X; melatonin; gamma-aminobutyric acid; glutamic acid decarboxylase; vocal control circuitry; frequency sensitivity; organ of Corti; auditory feedback; neural plasticity; seasonal plasticity; neostriatum; anterior forebrain pathway; lateral magnocellular nucleus; anterior neostriatum; lMAN nucleus; medial nucleus; dorsolateral thalamus; robustus archistriatalis; robust nucleus; archistriatum; song motor control nucleus; vocal motor system; gila cells; nonlinear oscillatory dynamics

歌唱行为；较高级的发声中枢；尾部核；腹侧上纹体；海马；鸣唱控制核团；鸣唱核；X区域；N-乙酰-5-甲氧基色胺；γ-氨基丁酸；谷氨酸脱羧酶；发声控制回路；频率灵敏度；柯替氏器；听觉反应；神经可塑性；季节可塑性；新纹状体；前脑前端路径；侧面大细胞核群；前部新纹状体；lMAN核；内侧核；背外侧丘脑；古纹状体粗核；健康的核；原纹状体；鸣声运动控制核；发声运动系统；毒蜥细胞；非线性振动动力学首页上一页共有 12 条记录，本页从第 11 到第 12 条。

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。