查询词典 vibration-proof

Based on the resemblance of deflection equation with free vibration equation, the reciprocal theory can be applied to the analysis of free vibration of unidirectional plate,and through which we can easily get the inherent frequency of unidirectional plate with different boundry supporting after assuming the form of free vibration.

利用单向板挠曲面微分方程和振型方程在数学上及力学上的相似性，提出了分析单向板自由振动的功的互等定理法。

In this paper, the author sets up the dynamic model of the vibratory extracting-driving piling machine, and carries out the dynamic analysis, parameter calculation and Matlab's simulation for this model. Using the equation reciprocity law to carry out the calculation of soil parameter and simulation, and using the genetic algorithm to make optimization of the machine on the basis of the simulation, the author gets the optimum self-induced vibration frequencies of the machine changing with the depth of the pile and the optimization result of other parameters, thus reaching the conclusion that along with the increase of pile sinking depth, the optimum self-induced vibration frequency becomes bigger, and the vibration mass becomes smaller, hence deepening the knowledge of the dynamic performance of this system.

本文建立了振动沉拔桩机的动力学模型并对这一模型进行了动力学分析、参数计算和Matlab仿真，并利用方程对等法进行土壤参数的计算和仿真，又在仿真的基础上使用遗传算法对桩机进行了优化，从而得出了路基加固振动沉拔桩机随沉桩深度变化而改变的最佳激振频率以及其它参数的优化结果，并得出了随沉桩深度的增加，桩机的最佳激振频率由小变大，最佳参振质量由大变小的结论，深化了对该系统动力学性能规律的认识。

In this paper, the author sets up the dynamic model of the vibratory extracting-driving piling machine, and carries out the dynamic analysis, parameter calculation and Matlabs simulation for this model. Using the equation reciprocity law to carry out the calculation of soil parameter and simulation, and using the genetic algorithm to make optimization of the machine on the basis of the simulation, the author gets the optimum self-induced vibration frequencies of the machine changing with the depth of the pile and the optimization result of other parameters, thus reaching the conclusion that along with the increase of pile sinking depth, the optimum self-induced vibration frequency becomes bigger, and the vibration mass becomes smaller, hence deepening the knowledge of the dynamic performance of this system.

本文建立了振动沉拔桩机的动力学模型并对这一模型进行了动力学分析、参数计算和Matlab仿真，并利用方程对等法进行土壤参数的计算和仿真，又在仿真的基础上使用遗传算法对桩机进行了优化，从而得出了路基加固振动沉拔桩机随沉桩深度变化而改变的最佳激振频率以及其它参数的优化结果，并得出了随沉桩深度的增加，桩机的最佳激振频率由小变大，最佳参振质量由大变小的结论，深化了对该系统动力学性能规律的认识。

Inherent frequency characteristics of X2105C-1 diesel crankshaft are carried out by using ANSYS finite element method. The modal analysis includes retortion vibration, bending vibration and lognitudinal vibration.

对x2105C-l型柴油机曲轴在自由模态下的固有频率特性进行了有限元分析，所计算的模态包含了扭转振动、弯曲振动和纵向振动。

Through transforming the vibration isolation system differential combined equations to the state space equation,it is possible to facilitate the solution of vibration isolation coefficient curve of vibration isolation system by using the Matlab/Simulink module.

通过将隔振系统的微分方程组转化为状态空间方程，使用Matlab/Simulink模块可方便求解隔振系统的隔振系数曲线。

Due to the regulating by the cubnonlinearities, some parametric ranges in which 3-times superharmonic vibration or 1/3-times subharmonic vibration arises exist in the sytem. When the excitation frequency approaching 3-times or 1/3-times resonance frequency, the system response is stable and periodic .This fact shows that regulating action of the cubic nonlinearities on the vibration system is strong.

由于立方非线性对达芬系统的调节，系统存在出现3次超谐共振和1/3亚谐共振的参数域，在激振频率接近3倍或1/3倍派生系统的固有频率时，立方非线性对系统的调节作用越来越强，从而使动态响应成为稳定的周期性。

Using the simulation calculation program and adopting the single factor analytic approach, simulation results are gotten and conclusions can be drawn from the simulation results. The parameters have a little influence on vibration of the driver's seat when the frequency of the vibratory force is larger than 20Hz, and the zone that the parameters have great influence on vibration of the driver's seat is nearby the sympathetic vibration frequency of the system which is about lOHz.

利用编制的模拟计算程序，采用单因素分析法，分析了各参数对驾驶员座椅处振动位移的影响：在激振力频率大于20Hz后，各参数对驾驶员座椅处振动影响较小；各参数对座椅振动影响较大的区域在激振力频率为10Hz附近的共振区。

Firstly the dissertation analyses the reason of vibration and noise of the transmission gear and the box, drawing a conclusion that the change of gear mesh rigidity and transmission error are the crucial causation to engender vibration and noise of the gear-box; the main source of the noise is the syntonic noise in box vibration and noise.

本文首先分别分析了变速箱传动齿轮和变速箱箱体的振动噪声产生机理，得知产生变速箱传动齿轮振动噪声的主要因素是轮齿啮合刚度的变化和传动误差的影响；且在变速箱箱体振动噪声中自鸣噪声是汽车变速箱的主要噪声源。

The relation of pre pressure, excitation volt for longitudinal vibration,excitation volt for torsional vibration, friction force, torque output, speed of rotor, and vibration speed of torsional vibrator is discussed.

根据模型讲座了预压力Fpre、纵振激振电压Vl、扭振激振电压Vt、摩擦力f、电机的输出扭矩Mout、转子转速ωR和扭振子振动速度ωV等的关系。

The calculations of torsional vibration of crankshaft systems of 12V240ZJ6E diesel engines were carried out with TVCA programme and I deas software to obtain system natural vibration frequencies, vibration amplitudes of various concentric masses at different rotational speeds, and torques and torsional stress es of various crankshaft sections at different rotational speeds.

运用TVCA程序和Ⅰ deas软件对 12V2 4 0ZJ6E型柴油机轴系的扭转振动进行计算，求出系统的自振频率、各集中质量在不同转速下的振幅和各轴段在不同转速下的扭矩、扭转应力值，对自振频率、自由端振幅和扭转应力最大轴段进行了分析，对轴系的扭转振动情况作出总结与评

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。