Since the first edition there have been many changes in the equipment available for measurements and the growing interest in Transmission Error measurement has spawned numerous approaches that are not always clearly described. Each author has a tendency to extoll the virtues of his approach but rarely points out the corresponding disadvantages, so I have attempted to compare systems. A range of new problems in from industry has generated some interesting additional topics. I have also added discussion of some of the less common but puzzling topics such as high contact ratio gears which are increasingly being used to reduce noise. Testing procedures are also discussed in more detail together with some practical problems and some slightly extended description of the failures that may be encountered and their relationship, or lack of it, to noise problems. I hope that few errors or mistakes have crept into the book but if readers discover errors I will be very grateful if they let me know (e-mail jds 1002@eng.cam.ac.uk)

Solving Problems in Dynamics and Vibrations Using MATLAB.pdf

GJB 150.16A-2009 军用装备环境试验方法 第16部振动试验GJB 150.16A-2009 军用装备环境试验方法 第16部振动试验GJB 150.16A-2009 军用装备环境试验方法 第16部振动试验

Dynamics and Vibrations MATLAB tutorial.pdf

本文提出一个新的光学双稳性模型.基于平均场近似,慢变振幅近似和绝热近似的思想,把光学双稳系统看成一个“黑箱”,类比非线性振动理论,指出不同的光学双稳过程(包括不同的工作物质和不同的腔(F-P腔或环腔)),能用一个恰当的强迫振动方程统一地描述.方程中所包含的都是可测量的宏观参量,使得可能直接用实验拟合,与理论结果进行定量对照.用振动理论的方法,把方程演变成自治方程组,从而方便地得到光学双稳性稳态和动态解的一般形式.并用若干已报道的具体例子验证了这个模型的普适性.

振动电机的结构及工作原理

电机振动在线监测系统项目解决方案

提出了一种基于多模干涉效应(MMI)的单模-多模-间隙-单模（SMGS）光纤悬臂梁振动传感器。采用光束传播法（BPM）对这种结构的光传输性能进行数值模拟，并通过有限元分析方法对光纤悬臂梁进行了振动模态分析，从理论上优化设计了该类光纤振动传感结构。在实验上制备了长度为22 mm的悬臂梁结构，详细研究了多模区光纤的长度对声频振动响应的影响。实验结果表明，该SMGS振动传感器在130 Hz时响应效果最好，对应的声压灵敏度为4 mV/mPa，线性相关系数为0.9962，线性度和可重复性良好，并且实验结果和理论模拟结果相符合。这种光纤振动传感器具有制备工艺简单、成本较低和灵敏度高等特点，有望应用于对某些具有特殊振动频率点的远距离振动传感。

考虑横向拉伸的FGM夹层双曲扁壳自由振动分析

提出一种基于3×3迈克耳孙干涉仪的分布式光纤振动传感系统，利用3×3干涉仪搭建零差相干检测的相位敏感型光时域反射计(φ-OTDR)。使用传输矩阵相位解调算法，通过对3×3迈克耳孙干涉仪的传输矩阵基本参数的求取，建立差分相位与干涉仪输出光强的对应关系，使用简单有效的软件运算程序对光纤中的瑞利散射光的差分相位进行解调，实现对光纤的扰动进行分布式探测。利用该系统对光纤线路上的振动进行测试，实验结果表明，系统能够对振动进行准确的定位，并有效地对音频和射频驱动的频率进行还原，系统有效传感距离为10 km。