强迫振动

However,for free decay method,its range of changing frequency is very narrow and the initial states of samples are not easily repeated because of the effect of crystallization;for forced oscillation method,the measuring results are seriously affected by crystallization,which is caused by slow heating rates.

然而，自由衰减法有限的变频范围，以及由于受晶化的影响，使两次升温测量时样品的初始状态不易重复；用强迫振动法测量时，同步变频条件限制了升温速率，造成金属玻璃的晶化过程严重影响了测量结果。

Forced vibration is when an alternating force or motion is applied to a mechanical system.

强迫振动是发生在使用外力或动作於机械系统。

If the excitation frequency is close to one of the natural frequencies of the bridge, further analysis is required to determine the dynamic amplification in what is known as a 'forced vibration' analysis.

如果激励频率接近一个自然频率的桥梁，进一步分析必须确定动态扩增什么是所谓的'强迫振动分析。

Through the theoretical model and milling experiment they discuss the condition of producing forced vibration and chatter in milling process and the chatter characteristics.

通过所建理论模型及铣削试验讨论了铣削过程中强迫振动、颤振的产生条件及特点。

The forced oscillators have been investigated with the use of the conjugated arithmetic operators and the matrix of the normal form theory.

第三章将非线性系统转换为一个四维的一阶系统，再进行非线性变换，将规范形理论中的共轭算子法和矩阵表示法联合一起应用，研究了强迫振动问题。

We emphasize the measuring principle of low frequency IF with forcing vibrate torsional pendulum.

重点讲述了强迫振动扭摆法测量低频内耗的原理。

Based on virtual displacement analysis, a linear model of four degrees of freedom is established in terms of Lagrangian equations to analyse the dynamic characteristics of automobile front wheel independent suspension system.

在虚位移分析基础上，利用拉格明日方程推导并建立了单侧前独立悬架系统线性四自由度动力学模型，并利用此模型进行了系统在不同激振力作用下强迫振动响应计算方法的探讨。

This numerical model, derived from viscid incompressible Navier-Stokes equations and finite volume method, aimed to solve the flow field around section undergoing prescribed vibration, and obtained aerodynamic forces series, with the ultimate objective to extract the flutter derivatives of the section.

该模型以粘性不可压Navier-Stokes方程和有限体积法为基础，通过求解作强迫振动的断面绕流场，由得到的气动力时程得到断面的气动导数。

From the results of our experiments we can conclude that the green compacts give evidence of non-linear characteristics during vibrating.

在不同应变振幅条件下，通过强迫振动实验测量了不同密度的铁、镍和铜粉末压坯的共振曲线。

Furthermore, the dynamic model of ball end milling process is developed and corresponding simulations are made.

在上述基础上建立了球头刀铣削动力学模型，对铣削过程中的强迫振动和自激颤振进行了仿真。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。