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There are various techniques for constructing analytical approximations to the nonlinear differential equation.

早期研究非线性振动的理论分析方法多局限於弱非线性振动系统,碰到强非线性振动系统就显的无能为力。

The model is implemented with the circuit simulation tool PSPICE, and can be used to analyse oscillating properties, including the detection mode transient response, stable response and frequency response to angular rate.

利用这个电路模型,可以分析陀螺的振动特性,包括检测振动的瞬态响应和稳态响应,检测振动对输入角速度的频率响应特性,从而可以获得陀螺工作的优化条件;并为传感器与接口电路的整体模拟打下基础。

For the application of the theory of antiresonance in mechanical network to vibration-utilization engineerings,three new types of antiresonant vibrating machine are put forword with their working principles described. Dynamic analysis is done by means of mechanical impedence to each type.

把机械网络中的反共振理论应用于振动利用工程,提出了三种新型反共振振动机械,从反共振角度阐明了它们的工作原理,并用机械阻抗方法分别对这三种振动机械进行了动态分析。

By applying the difference arithmetic to solve the differential vibration model of the single-degree-of-freedom,the acceleration responses of the vibrated bevel wheel was calculated.The bevel wheel contact fault was simulated by taking it as the impulsion loading in local point.By using techniques of wavelet de-noising and demodulated resonance,gear contact character information was picked up successfully.

从齿轮的单自由度振动模型出发,运用差分算法对模型进行求解,得到斜齿轮的振动加速度响应,将齿面接触型故障等效为在局部点突加一个冲击载荷,对齿轮齿面接触型故障进行了仿真,利用小波降噪和共振解调技术分别对仿真的染噪振动加速度信号进行处理,成功地提取了轮齿接触故障的信息。

In this thesis we have studied the lattice vibration of one dimensional atomic chain, researched the lattice vibration and the location of the localized modal while adding the impurity atom.

本文主要对一维原子链的晶格振动以及加入杂质原子后晶格的振动情况与局域振动模的分布情况进行了细致的研究。

The effect of conventional audiphone for the treatment of conduction deafness is unsatisfactory.

颞骨振动器是利用声音-交变电磁场-机械振动的转换,由颞骨的振动引起听觉。

It comes form vibration signal that obtained by monitoring in two mutual vertical direction on one cross section of the axletree or axes neck.

它可以通过振动位移和激振力的相位的变化来判断转子的临界转速;当挠性转子由不平衡力引起振动时,在不同的转速下有不同的振型,根据不同的振型对转子进行有针对性的平衡;另外根据检测到的轴心轨迹图形状,可以分析出造成振动的具体原因,根据不同的原因进行防振和减振。

It is stated, on basis of analysis on the blasting theories at home and abroad, that parameters, such as vibration velocity and vibration time should be introduced to analyze the influence of blasting on the surrounding structures. In the paper, the influence imposed by the blasting excavation of tunnels with extralarge crosssections is simulated, with Guanziling tunnel on LanzhouChongqing railway as an example.

在分析国内外爆破振动理论的基础上阐述要根据具体的工况,有针对性地引入振动速度、振动时间等多种参数进行分析,且以兰渝线关子岭特大断面隧道爆破为依托,应用数值分析方法,模拟特大断面隧道爆破振动对周边建筑物的影响。

The non-uniform flow behind a rigid cylinder row with a small pitch ratio T/D= 1.5 is characterized by narrow and wide near wakes and multiple frequencies, and the vortex shedding behind a rigid cylinder row with T/D= 2.0 is replicated properly by the simulation results.

此外,还研究了单列自由振动的弹性圆柱在间隙比为2.0时的流体诱导振动问题,结果表明:在大振幅条件下,流体诱导力在x方向和y方向有较强烈的耦合;随着振幅的减小,x方向振动对y方向振动的影响可以忽略,可采用单自由度的动力学模型假设进行计算。

After experiments, we got some results as the following:1.Induced by semi-conductor laser, solid DNA changes as below: 1the deoxyribose-phosphate backbone vibrations in DNA decreasing, these bands are at 884~890cm~(-1),1112cm~(-1) and 1168cm~(-1). 2 deoxyribose and C-O stretch vibration in d increasing, there are new bands occurring at 1436cm~(-1) and 1072cm~(-1), the intensities of these bands at 1466cm~(-1) and 1030cm~(-1) increase.

通过实验研究,得到如下一些结论: 1、固体DNA经半导体激光器照射后,可以导致以下变化:(1)DNA中脱氧核糖磷酸主链振动减弱,包括在884~890cm~(-1)、1112cm~(-1)和1168cm~(-1)处的谱带;(2)脱氧核糖以及d中CO的伸缩振动增强,在1436cm~(-1)和1072cm~(-1)处出现了新的谱带,在1466cm~(-1)和1030cm~(-1)处的谱带强度增强;(3)各碱基的振动频率和相对强度都发生了很大的变化,碱基中羰基的伸缩振动显著增强,在1650cm~(-1)和1670cm~(-1)处出现了新的谱带,在1710cm~(-1)处的谱带强度显著增强。

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