振动

In this paper Ⅰ successfully applied these methods to fault diagnosis, and presenting some new innovative machinery fault diagnosis method; First Ⅰ present a new gear wornout fault diagnosis method, this method use the vibration signal's time-frequency attribute and instantaneous phase undulation to accurately detect gear's fault, and by comparing with the traditional frequency domain analysis method, this method reveals that many nonlinear and nonstationary characteristic exist in gear's vibration, this tell us that if we use frequency domain analysis method without pay attention to the signal's characteristic, we could get wrong diagnostic result; Then Ⅰ present a new bearing fault diagnosis method, this method use ATVFD and Hilbert transform to do envelop demodulation,Ⅰ analyze the envelop with time-frequency method and find out that this method is more accurate then traditional method.Ⅰ also explain that the modulation of the fault to the carrier wave may also be non-stationary and nonlinear; Finally Ⅰ present a cylinder pressure measurement method of diesel engine by means of vibration, cylinder pressure is an important parameter of diesel engine fault diagnosis, the pressure measuring is simplified a lot by this method,Ⅰ also use the ATVFD and time-frequency analysis to realize it.

本文中将上述理论方法成功地应用到故障诊断中去，提出了几点创新性的诊断方法；提出了一种齿轮磨损故障诊断的新方法，该方法利用振动信号能量的时频域分布特征与瞬时相位波动特征可以进行精确的齿轮故障诊断，并通过与传统的频域诊断方法的比较，揭示出齿轮振动中存在的明显的非线性与非平稳特征，说明了不加选择地利用频域分析方法进行齿轮故障诊断很可能会得到错误的诊断结果；提出了一种轴承故障诊断的新方法，该方法利用ATVFD分解与Hilbert变换进行包络解调，并对解调得到的包络信号进行时频域分析，可以实现更加准确轴承故障诊断，说明了故障对载波信号的调制往往也是非平稳与非线性的；提出了一种利用振动信号进行柴油机汽缸内压力检测的新方法，柴油机汽缸压力的变化是柴油机故障诊断的重要参数，利用振动方法可大大简化汽缸压力的检测过程，该方法也是综合利用ATVFD分解与时频域分析方法实现的。

The main products have various forms of vibratory feeder, coal feeder, vibrating screen, silo wall vibrators, Vibrating motor; bucket elevator: helix, buried scraper, belts, impellers, discs, rigid impeller plate to feeder, such as a variety of products a total of more than 400 specifications of models, products sell well in more than 30 provinces, municipalities and autonomous regions, and exported to Europe, Asia, Africa 27 countries and regions.

主要产品有各种形式的振动给料机、给煤机、振动筛、仓壁振动器、振动电机；斗式提升机：螺旋、埋刮板、皮带、叶轮、圆盘、刚性叶轮、板式给料机等多种产品共400多个规格型号，产品畅销全国30多个省、市、自治区，并出口欧洲、亚洲、非洲27个国家和地区。

Because the current monitoring network cable is complicated and the cost is very high,this paper puts forward to a wireless vibration monitoring node design based on digital accelerometer ADXL202, with MSP430 and CC1100, respectively, as microprocessors and wireless communication module, thereby forming a wireless vibration monitoring networks, realize the vibration monitoring for coal washery plant machinery.

该论文针对当前有线振动监测网络布线复杂、成本高等问题，提出一种基于数字式加速度传感器ADXL202，以MSP430 和CC1100 分别作为微处理器和通信模块所组成的无线振动监测节点设计，进而组成一个无线振动监测网络，实现对洗煤厂机器设备的振动监测，并进行了简单地测试。

The results show that the vibration intensity of the substructure has a connection with the depth of the well, the geological condition and the density of drilling fluid; the horizontal vibration of the substructure is mainly caused by bent kelly; the included angle between the axis of cardan shaft and the derrick floor is also the cause of the vibration in three directions, and the cause of t...

分析结果表明，底座的振动强度与井深、地质条件和钻井液密度有关；弯曲的方钻杆是造成底座水平方向振动的最主要原因；万向轴因与钻台面存在夹角，从而引起底座在三个方向的振动；采用四挡钻进时，万向轴的工频及其倍频接近底座垂直方向的固有频率是引起底座在该方向振动强烈的原因。

In a O〓-Ar mixture, the dynamic process of vibration-dissociation coupling behind a primary shock front is studied. The variation of many of the physical quantities with time are calculated out, such as the vibrational energy level distribution, the vibrational energy, the vibrational relaxation time, the dissociation incubation time, the dissociation product concentration, the dissociation rate and the dissociation rate coefficient.

对O〓-Ar体系考查了正激波后振动激发与解离耦合的动态发展过程，计算给出了振动布居分布、振动能、振动弛豫时间、解离孕育时间、解离产物浓度、解离速率、解离速率系数各物理量随时间的演化。

This paper presents a new device, which use MR dampers to control vibration of the bridge.

本文提出一种新的装置，把MR阻尼器应用在桥梁的振动控制中，减小桥梁的竖向振动，并通过算例分析桥梁在移动荷载作用下的振动控制效果，验证用这种装置控制桥梁的竖向振动是行之有效的。

The paper establishes an appropriate model of vibration system composed of horn and gear. The transmission of ultrasonic is changed from longitude wave into transverse wave; the gear vibrates in flections mood and obtain larger vibration displacement in the grinding region.

本文提出了一个适用的振动系统模型，由变幅杆和齿轮组成一个复合振动系统，将超声波的传递方式，由纵波变为横波，齿轮作圆盘弯曲振动，使齿轮的磨削区域得到较大的振动位移。

The major products are concrete Jets concrete jet motor pumps YZ18A-IIIS, YZ20JA-IIIS, YZ18JB-S, YZ20JB-S, YZ18JC-S, YZ20JC-S, and other components of the drum vibration, tire-driven, self-hinged vibratory roller Series; LD110, LD120 Double-drum vibratory roller; YSZ06B, YSZ06C light Shoufu vibration roller; LJZ06B, ZL08-II ZL-10 ZL-10 ZL-12 ZL15 ZL-16 ZL-30 ZL-40 ZL-50, such as loading Machine; MLY4.0 WY-45 FT-220FC, such as hydraulic excavators and other products.

产品主要有混凝土喷射机混凝土喷射机电机水泵 YZ18A-IIIS、YZ20JA-IIIS、YZ18JB-S、YZ20JB-S，YZ18JC-S，YZ20JC-S等组成的钢轮振动、轮胎驱动、自行铰接振动压路机系列；LD110，LD120双钢轮振动压路机；YSZ06B、YSZ06C轻型手扶式振动压路机；LJZ06B，ZL08-II ZL-10 ZL-10 ZL-12 ZL15 ZL-16 ZL-30 ZL-40 ZL-50等装载机；MLY4.0 WY-45 FT-220FC等液压挖掘机等产品。

The welding deformation and residual stress are decreased evidently.The dimensional stability and service security of the welding structure are increased obviously.The impact absorbing energy of weld is improved by 21% under vibratory weld conditioning. And the effect of mechanical vibration on the impact absorbing energy of weld is greater than that of HAZHAZ are refined distinctly. The fusion area and overheated zone are narrowed. And the dimension of Widmanstaten structure minishes or disappeares.

试验结果表明：振动焊接后，焊接变形和残余应力明显降低，焊接结构尺寸稳定性和使用安全性大大提高，振动焊接后焊缝试样的冲击吸收功平均值比常规焊接下冲击吸收功的平均值提高了21%，且振动焊接对焊缝冲击性能的影响要明显大于对热影响区冲击性能的影响；振动焊接使得焊缝和热影响区的组织明显细化，熔合区和过热区变窄，魏氏组织减小或消失。

The deterministic and statistic methods are employed respectively to study theforced response of the mistuned bladed disk under various system parameters withrespect to the deterministic and random mistuning. In the statistic analysis, wepropose a method that calculates and compares the statistics of the maximum andaverage vibratory responses.

在进行统计分析时，特别地提出了对失谐叶盘系统的最大振动响应和平均振动响应进行统计和比较的分析方法，利用该方法可对失谐叶盘系统振动能量的集中程度进行分析，从而更全面地认识失谐叶盘系统振动响应的局部化特性。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。