受迫振动

Characteristics of free vibration and forced vibration of a damped system with dry frictional damping,viscous damping and c x·2 damping are analyzed and calculated,acceleration response of free-vibration of the dry frictional damped system has a sudden change when x· is zero,the change value is constant and depends only on the natural frequency ωn and the displacement xk due to dry friction.

本文对存在干摩擦阻尼、粘性阻尼和c.x2阻尼系统的自由振动及受迫振动特性进行了解析及数值计算，得到干摩擦阻尼系统自由振动的加速度响应在速度零点有一突变，这一变化量为定值，且只与系统固有频率ωn及摩擦当量位移xk有关。

One of the features of a forced oscillation is the energy in the oscillation.

受迫振动的特点之一是振动的能量。

The continuing role of foreign forces in the cycle under forced vibration of the vibration, such as forced cyclical external force.

在周期外力的持续作用下所产生的振动为受迫振动，这种周期性的外力称为强迫力。

Vibration into free vibration, vibration and forced vibration damping.

振动分为自由振动、阻尼振动和受迫振动。

Characterization of the nature of the forced vibration amplitude of the forced vibration frequency and phase frequency characteristics (amplitude and phase frequency characteristics).

表征受迫振动的性质是受迫振动的振幅频率特性和相位频率特性。

As author's conclusion, the vibration of the alying head is a first order non-resonance response of forced vibration.

从而排除了上述两种振动说法，确定了吐丝机的振动属于系统一阶受迫振动非共振响应。

In this paper, reciprocal theorem method is generalized to solve the problems for the forced vibration of thick rectangular plates based on the Reissner s theory.

本文将功的互等定理法推广应用于求解基于Reissner理论的厚矩形板受迫振动问题·本文导出了厚矩形板动力基本解；给出了三边固定一边自由厚矩形板在均布简谐干挠力作用下稳态响应的精确解析解·这是计算厚矩形板受振动稳态响应的一个简便通用的方法

The nonlinear is incarnated when the ball is rolling respectively on three concaves. The track driven by motor is in simple harmonic vibration, and the frequency and amplitude of simple harmonic vibration of the track can be considered as adjusting parameters.

以滚球在3个凹形槽上的受力体现作用的非线性，导轨由电机推动作简谐振动，滚球在导轨上作受迫振动，可以把导轨作简谐振动的频率或振幅作为调整参量。

In the machine process creation of vibration all have is forced a vibration and from arouse vibration, and tool machine, tongs, knife and work piece the dynamic state characteristic of craft system for constitute relevant.

在机械加工中产生的振动都具有受迫振动和自激振动，与机床、夹具、刀具和工件组成的工艺系统的动态特性有关。

Because the error mainly comes from theresonant region, the error correction method can only be used in resonant region, andcan effectively improve the efficiency of the statistical analyzing solutions. Two types of the mistuned bladed disks, whose friction damping are blade dryfriction damping and blade-to-blade dry friction damping, are modeled respectively. Amulti-harmonic method which can employ the fast Fourier transformationtechnique is proposed to investigate the vibratory response of the bladed disks withthese two types of nonlinear friction damping. Formulations of the solution for thesetwo types of motion functions are deduced. The characteristics of the forced responseof the bladed disks with these two dry friction damping are analyzed and summarizedunder various system parameters. The vibratory response of the bladed disk with dryfriction scatter mistuning is investigated.

针对叶盘系统中两类主要的非线性干摩擦阻尼形式，分别建立了具有叶片干摩擦阻尼和叶间干摩擦阻尼的失谐叶盘系统的非线性力学模型；提出了一种可利用快速傅立叶变换技术的多谐波分析方法；分别推导了具有这两类干摩擦阻尼形式的叶盘系统运动方程的求解公式；在各种系统参数条件下，研究了干摩擦阻尼失谐叶盘系统的受迫振动响应特性；对具有干摩擦散乱失谐的叶盘系统振动响应进行了研究，分析总结了干摩擦散乱失谐对叶盘系统振动响应特性的特殊影响规律。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。