查询词典 time of vibration

The mathematical model to describe the vibration state of wire under the action of ultrasonic vibration and discharge force has been established, through which computer simulation has been made to study the influence of ultrasonic excitation on the vibration state of wire and distribution of discharge spots.

本文首先建立了描述超声线切割复合加工中电极丝振动状态的数学模型，并计算机模拟分析了超声振动对复合加工中电极丝振动状态及放电点分布状态的影响。

The initiative and passive methods to decrease the vibration have been studied. The results of decreasing of vibration with the installing of hydraulic liners between the chocks and stand have been researched using the simulation software. The hydraulic liners can decrease or eliminate the vibration effectively.

研究了轧机垂直系统主动减振和被动减振的措施和策略，并运用仿真分析手段，研究了轴承座与机架间采用液压衬板的减振效果，发现采用液压衬板可以很好地抑制轧机垂直系统自激振动的发生。

In chapter 2, based on analysis for the existed methods of torsional vibration measurement, a novel measuring method, parallelling dual-beam laser doppler torsional vibration measurement is first put forward by the author, it not only divides translation and rotation of the rotor, but also can be used to measure torsional vibration of non-cylinder rotor.

本文的第二章在分析现有扭转振动测量方法的基础上，首次提出平行双光束激光多普勒扭转振动测量方法，它不仅解决了转子平动与转动的完全分离，还能测量各种非圆形截面转子的扭转振动；为辨别转子的转动方向，还提出双频激光多普勒测振仪，满足故障诊断对测量启、停转子和转速方向变化转子性能的要求。

At present, the Company electromagnetic vibration feeder, air hammer, level gauge, solenoid valve and control device, screw feeder, belt conveyor, bucket elevator, dust collector, zero speed switches, proximity switches, high-frequency coil , electromagnetic vibrators, vibration hopper, vibration controllers, marking electromagnet, power conditioners, heating units, heating the first, high-frequency cable, high-frequency transformers, ignition transformers and other products have been sold all over the country, has been unanimously praised users .

目前，本公司电磁振动给料机、气锤、料位计、电磁阀及控制仪、螺旋给料机、皮带输送机、斗式提升机、除尘器、零速开关、接近开关、高频线圈、电磁振动器、振动料斗、振动控制器、打标记电磁铁、电源调节器、加热单元、加热头、高频电缆、高频变压器、点火变压器等产品已销往全国各地，得到了用户一致好评。

The vibration caused by the cylinder and the cylinder head can balance the vibration of the piston. This thesis focuses on an invention test of the vibration of the engines.

本研究针对此一引擎减振发明作实体测试，内容包括对一市售机引擎进改装，使其符合本发明之作动原，然后测此一原型机引擎之振动况。

On the basis of actual blasting vibration field, this paper proposes the method, which can predict the response of the structure to the blasting vibration according to the blasting vibration stimulation and parameters of the structure.

在考虑实际爆破震动场的基础上，本文提出了一种根据爆破震动激励和结构本身参数来预测结构对爆破震动响应的方法。

Confirming the space place of weakness plane, potential failure model of slope and comprehensive choosing of rock mechanical properties are discussed in the paper. The blasting vibration is tested and the consults are analyzed by regression analysis, binging forward the velocity and acceleration attenuating law of slope rock mass. The stability of two typical slope profile and sensitivity-analysis of the influence blasting vibration to slope stability are analyzed by Sarma method. Bring forward the technical measures of reducing the influence of blasting vibration to slope stability.

本文针对兰尖矿营盘山高陡边坡的工程地质特点，查明其边坡工程、水文地质条件，弄清控制边坡稳定性的F_(108)、ω_6、泥化夹层等软弱结构面的空间位置和边坡潜在的破坏模式以及岩石力学指标的综合选取；对生产爆破振动进行了测试，并对测试结果进行了回归分析，得出边坡岩体质点振动速度及加速度的衰减规律；用Sarma法对两个典型的边坡剖面进行了稳定性分析和爆破震动对边坡稳定性影响的敏感性分析；提出了降低爆破震动对边坡稳定性影响的技术措施。

First, this paper presents three girders model with double cable planes which main girder and side girder is connected by rigid arms, analyzes the dynamic characteristic of Yonghe cable-stayed bridge and obtains its natural vibration modes (i.e., frequency, damping values and the mode shapes ) by ANLSIS structural analysis program and uses these parameters as dynamic dactylogram of the intact case of cable-stayed bridge. Using the passage of random as the ambient vibration ,the dynamic properties of Yonghe Bridge is measured and the modal parameter of its 15 years after is identified and used as dynamic dactylogram of the damaged case. By the finite element analysis and locale vibration test, damaged and undamaged modal parameter is analyzed and curvature mode shape, which is sensitive to damage state, is introduced as possible candidate for identifying and locating damage in the cable-stayed bridge. Selecting the branch of part measured point from modal parameter, this paper deduces the damaged index which can detect the possible damaged location of the cable-stayed bridge deck and identifies the damaged region and degree for Yonghe Bridge. For the purpose of structural condition monitoring in in-situ , from another viewpoint, this paper introduces the method called the best optimization vector to detect damaged location and degree. The accuracy and reliability of the method presented in this paper are demonstrated by static analysis and test and the healthy state of Yonghe Bridge can be evaluated.

建立了双索面通过刚臂与主梁及边梁相连的三梁式力学模型，采用ANSYS结构分析程序对永和斜拉桥进行动力分析，对其振动模态参数进行识别，以此作为斜拉桥完好状态下的动力&指纹&；采用自由交通流作为环境振源，对永和斜拉桥动力特性进行测试，识别出永和斜拉桥使用15年后的模态参数，确立了破损状态下的动力&指纹&；利用有限元分析、现场振动测试，对破损前后的模态参数进行分析，提取对破损状况较敏感的模态曲率作为斜拉桥破损诊断的参数；并从模态参数中选取部分点的分量，导出可以指示斜拉桥桥面大概损伤位置的Index损伤指标，识别出斜拉桥发生破损的区段及破损程度；考虑大型斜拉桥在线监测要求识别破损的具体位置，从另一角度提出采用最优矢量法具体确定破损发生的位置及程度；为验证本文研究成果，对永和斜拉桥进行静力分析及静力测试，对其健康状况提出可靠的评价。

After studying casting process from ladle to pouring box and protection casting supporting mechanical structure, vibration dynamics model of supporting structure is founded, also variation of steel water impact force and influencing factors of inspecting spot vibration are discussed. Primary analysis is done for steel water vibration signal by the way of basal wavelet processing method, and the deeply feature extraction is finished to realize the effective recognition for steel water status using wavelet package method.

通过对钢包到中间包保护浇注的过程及其支承结构的相关研究，建立保护浇注支承结构的振动动力学模型，并且考虑对钢液冲击力的变化及影响测振点振动的因素，利用基本小波处理方法对钢水振动信号进行初步分析，并通过小波包技术进行进一步的特征提取，最终实现对钢液状态的有效识别。

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。

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。