固有振动

In this paper it is believed that the onset process is from the unorderly sound waves generated by heated gases, through ordering the sound waves, regenerator onset in a high natural frequency, followed by steady oscillation whose frequency is controlled by resonance tube.

本文认为热声热机的起振过程是从气体被加热产生杂乱的声波开始，经过声波的规则化先从回热器的高频率自激振荡振动，继而扩展到以谐振管内气体固有频率为主导的整个系统的稳态起振。

This product works on the principle that the inertial vibrating riddler almost reaches resonance. It had a high rate of screening and big swing of the screening machine that it does not jam the screen sieve. It is also of great adaptability to materials. The main vibrating spring uses cutting rubber spring which has low noise, and a long life. It is sealed to prevent environmental pollution. The working efficiency is 3 times than that of the original frequency. It has a good anti-vibrating effect.

该机采用惯性共振系统在近共振状态下工作，单位面积筛分效率高，筛机振幅大不堵筛，对物料适应性强，主振动弹簧选用剪切橡胶弹簧，设备噪音低，寿命长，机壳密闭性好，环境污染小，工作效率为阁振系统固有频率的三倍，有良好的隔振效果。

Based on a series of industrial experiments, the chattering of a temper rolling mill has been studied.

对某平整机的颤振进行了一系列工业试验研究，分析计算了平整机的振动频率、固有频率以及可能的外激励频率。

ANSYS software was used to analyze the two models. Results When Couette flow was loaded, the stereocilia had a larger angular displacement in non-coupled manner, Von Mises stress were higher on tip link and rootlet, and the characteristics of natural frequency were quite similar on two models.

结果 模拟Corti器振动过程，在相同剪切流的压力作用下，静纤毛在不接触盖膜时表现偏移度较大；两种模型均表现在静纤毛顶连接及小根基部应力较高、固有频率近似。

Based on the existing 3-D mechanical equation of drill string, considering the influence of lateral shearing strength and shearing strain on flexural deflection of drill string, the universal basic equations for the shearing deformation of drill string are established according to the deformation and force characteristics of the drill string.

该公式综合描述了横向剪切变形和轴向钻压对钻柱横向振动固有频率的影响，是对现有钻柱力学基础理论的补充和完

Through the model analysis on the structure of torpedo cars body with Block Lanczos method, the first fifteen natural frequency and vibration modes are calculated. Moreover, it also looks for the idiographic measures to boost up torpedo car against vibration by analyzing the reason for that.

运用分块Lanczos法对混铁车罐体结构进行了模态分析，得出了罐体的前15阶固有频率和振型；分析了引起混铁车罐体振动的原因，以寻求增强混铁车罐体抗振性能的具体措施。

In many practice problems such as to know the resonnance frequency of a structure and to know the critical value for the stability of a dynamical system,often need to compute the eigenvalues of a symmetric matrix. The chief method to compute the eigenvalues of a symmetric matrix is first to transformate the matrix to a symmetric tridiagonal matrix similarly and orthogonally, then to use the QR method with shift to the symmetric tridiagonal matrix.

很多实际问题，如求结构振动的固有频率，动力系统稳定性的临界值等常常归结为计算对称矩阵的特征值，而首选的计算方法是先把该矩阵正交相似变换成一个对称三对角矩阵，再对这个对称三对角矩阵用带位移的QR方法。1968年J.H。

The fre-quency equations are derived according to stress match, consid-ering gear as a thin bar and adopting exponential horn. Then the influences of vibration of transformer which consists of horn and gear are explored, which come from the length of horn and the machining frequency. It has been discovered that the reso-nance frequency of the horn is the detune one of transformer and the resonance frequency is not same as one of horn, which provide theoretical rules for transformer design.

鉴于此，根据应力耦合，将齿轮作为圆盘，采用指数型变幅杆，推导频率方程，对变幅杆的设计长度和变幅器振动频率进行数值分析，发现变幅杆的共振频率恰好是变幅器的失谐频率，变幅器的共振频率与变幅杆的固有频率也不相同，这能够为超声珩齿变幅器的设计提供理论依据。

Since the natureal frequency of the structure can be obtained from any one of test points on it, ie. regardless of its position, the glueyness may be responded from the discrepancy of autospec-trum structure of the bicycle frame glued. For such a specified structure system,therefore, vibration monitoring which takes...

由于结构的固有频率可以从结构上任一试验点获取，即与试验点的具体位置无关，胶接车架自谱结构的差异可反映胶接质量的不同，因此，对于胶接自行车车架这一具体结构系统，以响应的自谱结构作为诊断特征的振动检测方法是简便可行的。

The third type is to measure the dynamic characteristics excited by environment. This method has attracted more and more attention due to the characteristics of convenience, feasibility and not intermitting traffic and so on.

模态试验是获取结构振动的原始数据（通常是加速度的时间历程），通过分析测量所得到的原始数据来获取桥梁结构的固有模态。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷