固有频率

The first, A finite element method to compute the natural frequency of sandwich plates is found.

首先对粘弹性复合夹层结构的固有频率和动力响应进行研究，给出了一种计算粘弹性阻尼夹层板结构动力响应的方法，并编制程序进行求解。

The effect factors on its natural frequency are analyzed through practical examples.

通过实例分析了影响固有频率的各种因素。

. All structures have a number of natural frequencies at which they tend to vibrate.

2.9项。所有结构有一些固有频率时，他们往往震动。

Low frequency oscillation resonance mechanism of two-machine system was established in this paper. The relations between natural oscillation frequency and damping of two-machine system were analyzed.

理论推导了两机互联系统的共振机理，分析了两机互联系统固有频率与阻尼的关系。

Finally, natural frequency is obtained by the existence condition of nontrivial solution of the numerically discrete algebraic equations derived from the integral equations.

最后由积分方程的离散化方程组有非平凡解的条件，求得固有频率。

The method in this paper is verified through ANSYS, by using the finite element modal analysis. The calculation for the derrick of an oil drilling rig shows that the error is not exceeding 1\%.

通过ANSYS有限元分析对该估算方法进行了验证，并在石油钻机井架底座的有限元模态分析中应用该方法对系统固有频率进行了估计，误差均不超过1\%。

The finite element model of the free vibration for the rigid suspension catenary and pantograph is set up.

建立刚性悬挂接触网的自由振动有限元模型，计算其固有频率和振型。

According to thermoelastic deflection of the V-shaped titled beam, the forth-factorially partial differentiation equation is used to describe the dynamic performance. Then the natural frequency and the mode of the actuator are obtained through analyzing of free vibration modal.

根据硅微致动器V型斜梁热弹性应力变形，推导出弯曲振动的四阶偏微分方程，通过其自由振动模态分析，得到了斜梁弯曲振动的各阶固有频率和振型。

Using this theoretical formula, we estimated the inherent frequency of penstock system in Three Gorges hydropower station.

利用此理论公式，估计了三峡电厂引水系统的实际固有频率，所得结果与实测值比较接近，从理论上证实了水体共振引发异常振动的可能性。

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。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐