强迫振动

Inspirited periodically by means of centrifugal inertial force, the lopsided rotor will produce coercionary vibration and inordinate noises, accordingly result in the exacerbating of the working conditions. At the same time, the components of the axletree will wear down quickly, that has reduced the natural life and working efficiency.

由于周期性的离心惯性力对转子的激励作用，不平衡转子将产生强迫振动和过度噪声，从而导致工作环境恶化，加速轴承等零部件的磨损，降低机器的使用寿命和工作效率。

Then, a typical 5-degree-of-freedom system with cubically nonlinear stiffness was given to show the accuracy of the new method.

然后，以一个含有立方非线性的5自由度强迫振动系统为例阐明了新方法的有效性。

Differential equation of a damped forced vibration and its solution.

有阻尼强迫振动微分方程的标准形式，二阶常系数非齐次微分方程。

It can be concluded that the feature of position curve of water in jig is the same as the curve of typical damped vibration. In the equations the motion parameters of water in jig, such as velocity, acceleration, force etc. are in a direct proportion to the air pressure, and have a definite non-linear relationship with jigging cycle, thickness, and mobility of jig bed.

结果表明，水流运动的位移曲线特性符合阻尼强迫振动规律，水流运动的位移、速度、加速度、受力、动能等运动参数与跳汰机风压有直接的线性关系，与跳汰周期、阻力、床层松散度等跳汰参数有明确的非线性关系。

According to elastodynamics theory, the dynamic model of machining the slender rod is founded by axial turn -milling, the calculation formula of the natural frequencies and the main vibration mode are ob- tained, and the dynamic response of the slender rod forced vibration is studied under simple harmonic excitation.

根据弹性体动力学理论，建立轴向车铣细长杆的动力学模型，得到了各阶固有频率和主振型的计算公式，分析了在简谐激励下细长杆强迫振动的动力学响应。

Firstly, the natural frequencies and normal mode shapes of the fluid-conveying pipe with zero fluid velocity (i.e. U=0) were determined with the transfer matrix method. Next, these natural frequencies and normal mode shapes were used to derive the equation of motion for the fluid-conveying pipe with fluid velocity U.neq.0 by using the expansion theorem. Finally, the free and forced vibration responses of the pipe with flowing fluid were obtained by means of the Jacobi method and the Newmark direct integration method.

首先吾人使用转移矩阵法来求取一流速等於零(即U=0)、跨距数为N之流体输送管的自然频率及其所对应之正规化振态，然后利用振态重叠法原理来推导流速不等於零(即U.neq.0)时，整个流体输送管在外力作用下的运动方程式，最后再以Jacobi法及Newmark直接积分法来计算该水平流体输送管的自然频率及强迫振动反应。

Is called the differential equation of forced oscillation.

的微分方程称为强迫振动的微分方程。

Some sufficient conditions for the forced oscillation of solutions of the systems are obtained.

研究具有连续分布滞量的非线性中立型双曲偏泛函微分方程系统，获得了该类系统解强迫振动的充分条件。

In this paper,by using the characteristic equation,some forced oscillation of certain delay hyperbolic differential equation s are obtained.

借助其特征方程，获得了一类时滞双曲型微分方程解的强迫振动的若干充分条

As a new kind of supporting member, a prestress self-balanced cable truss has been widely applied in point-supported glass curtain walls. The free and forced vibration behaviors were analysed.

预应力自平衡索桁架作为点支玻璃幕墙的支承体系有着广泛的应用，该文研究了这一结构形式的自由振动和强迫振动。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。