固有频率

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。

Ritz method was adopted to study the natural frequency of nonlocal elastic bar .

采用Ritz法求解了非局部弹性直杆的固有频率问题。

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。

Composite material; rectangular sandwich board ; Z-core ; natural frequency ; finite element

复合材料；矩形夹层板； Z字型夹芯；固有频率；有限元分析

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

Fault condition includes the descent of cable force, sinkage of bridge tower and structure change of the main girder. Data recorded are cable force, girder stress, girder linetype, frequency response function, mode shape and etc.

其中损伤的形式有索力下降、主梁局部刚度变化以及桥塔不均匀沉降等，监测的参数主要有拉索索力、桥面线型、主梁应变等静态参数以及主梁固有频率、频响函数和振型等动态参数。

Based on the theory of finite element method and modal analysis, the model of a piano soundboard is established in the ANSYS, then the models' natural frequency, mode shape are calculated. What is more, the influence of tree species on the piano soundboard's fundamental frequency is discussed.

基于有限元法和模态分析的基本理论，利用有限元分析软件ANSYS建立了钢琴音板的有限元模型，然后对钢琴音板进行模态分析，得到了它们的固有频率、模态振型等参数，分析了树种对于钢琴音板基频的影响。

The graph of relation between inherent frequency of internal spur gear and its structure parameters are obtained.

该方法是分析齿轮的固有频率相对齿轮结构参数的变化率。

The inherent frequency of the stretcher bed is 2.7 Hz, which is out of the sympathetic vibration area of decubital body. Through adjusting and optimizing the stiffness and damping of vibration reduction equipment, the stretcher bed is more comfortable.

该担架床的固有频率为2.7Hz，避开了与卧位人体的共振区，并且可通过调整、优化担架床减振装置的刚度和阻尼，改善乘员的乘坐舒适性。

Used FEM model of ZS250GS motorcycle has been set up. Inherent frequency, vibration mode and syntonic response of the motorcycle have been analyzed.

建立了ZS250GS型摩托车整车的有限元分析模型，进行了固有频率、模态、发动机刚性和弹性悬挂下的谐响应分析。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐