Two degrees of freedom systems: free vibration and forced vibration;
两自在度系统：自在振动和受迫振动；
The sources of forced vibration in the machine tool are found by means of the free running experiment.
通过空运转试验查明了机床受迫振动的振源。
Then, the free vibration and the forced vibration of the rotor are obtained by means of Runge-Kutta method.
然后，采用Runge - Kutta方法求解了多种参数下的自由振动和强迫振动。
It is considered that the vibration of the bottom bearing damper belongs to forced vibration of nonlinear system.
认为下阻尼器在离心机运行时的振动是非线性系统的受迫振动。
Magnetoelastic forced vibration of a thin round plate subjected to mechanical loading in magnetic field is studied.
研究了电磁场环境下机械载荷作用圆形导电薄板的磁弹性强迫振动问题。
An iterative computation method for nonlinear forced vibration equation on helicopter blade aerodynamic load is given.
介绍用迭代方法求解直升机桨叶气动载荷中的非线性强迫振动方程。
In this paper, the vertical forced vibration of dynamic foundation on viscoelastic layered half space was studied in detail.
本文较深入地研究了层状粘弹性半空间上刚性圆形基础的垂直振动问题。
In this paper, the nonlinear forced vibration of circular plates with thicknesses varying according to power indexes are studied.
本文研究了厚度呈幂指数规律变化的变厚度圆饭的非线性强迫振动问题。
In this paper, suppression of chaos in a forced vibration system with a square term by resonant periodic perturbations is studied.
本文研究了用与受迫力谐波共振的周期摄动抑制含二次非线性项受迫振动系统中的混沌。
The harmonic responses and forced vibration are analyzed and the results are verified by the system's torsional vibration testing.
系统谐响应分析和强迫振动分析结果通过传动系统扭振实验得到了验证。
The new type of pile engine of grouting adopts structure of eccentric block vibration, setting pile by forced vibration soil to be broken.
新型灌注沉桩机采用偏心块振动式机构，强迫振动土壤破裂下沉桩管。
Under the simple harmonic vibration, the stable forced vibration of multiple-degree-of-freedom system is analysed by using ANSYS software.
运用ANSYS软件分析多自由度系统在简谐激励作用下的稳态受迫振动。
In this paper, the solution of steady forced vibration for continuous orthotropic plates is given on the basis of complex damping assumption.
本文给出了采用复阻尼理论时正交各向异性连续板强迫振动问题的稳态介。
According to coupling principle and excited force of shafting system, a model of coupled torsional-axial forced vibration can be constructed.
根据刚度耦合原理，并考虑轴系强迫激励进而建立了扭纵耦合强迫振动模型。
The forced vibration of pendulum is described by four-dimensional phase space and the fourth order autonomous ordinary differential equation.
本文用四维相空间和四阶自洽常微分方程描写了单摆的受迫振动。
To get an exact solution of the forced vibration of the beam bridge under the load of moving vehicles is difficult in the engineering design.
桥梁在移动车辆荷载作用下的振动分析是工程设计中有待进一步解决的问题之一。
If mass or stiffness perturbation is considered to be a harmonic excitation, one has obtained a forced vibration equation to the original structure.
将质量和刚度摄动看成是对原结构的简谐激励，获得原结构广义坐标的受迫振动方程。
Mechanical vibration (2 credits) Summary: The single degree of freedom systems: free vibration, forced vibration damped and forced vibration damping;
机忻魅振动 （2学分）内容撮要：单自在度系统：自在振动、有阻尼受迫振动和无阻尼受迫振动；
The first ten natural frequencies, damping ratios and mode shapes of the dam were measured through steady forced vibration test using multiple vibrators.
用多台起振机进行稳态强迫振动试验，测定了该坝前十阶自振频率、阻尼和振型。
The principle of vector method of single plane for spot balance of rotor has been present by forced vibration of single freedom system and rolling vector.
用单自由度系统的受迫振动和旋转矢量阐述了转子现场动平衡的单平面矢量法的原理。
The test and analysis show that the shimmy is a forced vibration and can be restrained by controlling excitation source and increasing steering system damping.
试验及分析表明，该车摆振主要为强迫振动，通过控制激振源、增大转向系统阻尼可抑制摆振。
The Excited frequency of forced vibration diverge from the Natural frequency of the machine tool, and the machine tool can be put on the practical application.
机床受迫振动的激振频率避开了机床的固有频率，该机床可以投入实际应用。
Compared with forced vibration tests, the ambient vibration test is more convenient and it has enough accuracy for the small amplitude response characteristics.
与强迫振动试验相比，环境振动试验比较简单、方便，所确定出的小振幅水平下的木塔结构动力特性具有足够的精度。
External elastic damping support, if designed reasonably, may obviously improve the natural or forced vibration response characteristics of bearing rotor systems.
设计参数合理的外弹性阻尼支承可以明显改善轴承-转子系统的固有特性及强迫振动响应。
In this paper, we consider the problem of cha OS control in a class of forced vibration system with both square and cubic nonlinear terms and uncertain parameters.
研究了一类同时含有平方项和立方项，且带有不确定性参数的受迫非线性振子混沌控制问题。
The iterative method is added into direct integral method to analyze forced vibration problem of laminated composite shallow shells while the relative formulas are derived.
为了求解复合材料多层扁壳在初始薄膜力时的强迫振动，在直接积分法中加入了迭代步骤，推导出了相应的公式和计算步骤。
By using separation of variables and double Fourier series, we obtain a solution to the initial-boundary value problem of the forced vibration of this rectangular membrane.
利用分离变量法和二重傅里叶级数的方法，得到了矩形膜的受迫振动初边值问题的解。
By using separation of variables and double Fourier series, we obtain a solution to the initial-boundary value problem of the forced vibration of this rectangular membrane.
利用分离变量法和二重傅里叶级数的方法，得到了矩形膜的受迫振动初边值问题的解。
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