Raft vibration - isolating unit is a device that can isolate the transmission of vibration and structure noise to the base effectively 浮筏隔振装置是一种十分有效的减少机械振动噪声传递的装置，如设计完美，能将振动能量减少35 40db 。
The results show that the main noise source is the fuel cell auxiliary system while roof panel and rear quarter panel are the key parts contributing to noise radiation 其总布置和噪声源有别于传统汽车，为了提高乘坐舒适性，很有必要研究其振动噪声特性。
Dialing the working process of the level rudder hydraulic system in submarine , serious vibration and noise will be produced , which affects the submarine ' s combating capability 潜艇水平舵液压系统在工作过程中，振动噪声严重，影响潜艇战斗力的综合发挥。
Acoustics - characterization of sources of structure - borne sound with respect to sound radiation from connected structures - measurement of velocity at the contact points of machinery when resiliently mounted 声学.关于由连接结构产生噪声辐射的结构载振动噪声源的特性描述.机械装置弹性连接接触点声速测量
Following is my main works : 1 . structure of gear transmission with meshed medium belt is designed . lubrication performance and vibration & noises of this transmission are analysed 本课题主要研究内容和进展为： 1 、根据提出的带式啮合介质齿轮传动的概念，进行结构设计，分析了该传动的润滑性能及振动噪声。
Are introduced . the necessity of designing the combined sensor which is held manually and the significance of experiment study of the vibration noise are put forward in chapter one 本文第一章介绍了发动机振动噪声的产生和危害，测试系统现状，提出了手持式一体化传感器设计的必要性，振动噪声实验研究的意义。
This paper also concluded kinds of numerical analysis methods and kinds of analysis software of solving the vibration and noise problem , and had a detailed presentation about the other parts of the noise simulation 在论文中对现有的解决振动噪声问题的各种数值分析方法、各类分析软件和噪声仿真的其他各个环节做了细致的归纳和总结。
Study mechanical vibration and noise theory , through analyzing the frequency spectrum of the vibration noise , study the spread characteristic of the vibration noise and method and technology of reducing vibration and noise , improve the security and environmental protection of the equipment operation 研究机械振动与噪声理论，通过对振动噪声的频谱分析，研究振动噪声的传播特性及减振、降噪的方法与技术，提高设备运行的安全性和环保性。
The main achievements are as follows : based on the research of principles and methods of data collection and processing , the dissertation put forward using vxd to accomplish break response of hardware and utilizing control principle of dma to realize data transfer of high speed . so the dissertation conquers the defect of bad real - time characteristic of windows because of multitask function and message mapping and accomplish real - time of collection and analysis . and the dissertation develops the system of signal collection and analysis to test vibration and noise and analyze structure dynamics 主要工作及创造性成果如下：提出了利用vxd来实现硬件中断响应，并运用dma控制原理实现了高速数据传输，克服了windows操作系统多任务功能及消息映射机制所带来的实时性差的弊端，从而实现采集和分析的实时性，开发出适用于振动噪声测试、结构动力学分析和机械在线检测的信号采集分析系统。
The research of this paper starts from mechanical vibration , then goes deep into the noise radiation caused by vibration and calculates the relevant acoustic and pressure field . the purpose of this research lies in the virtual reality of the mechanical vibration and noise based on the above acoustic and pressure field 本文的研究目的在于，从对机械结构的振动的研究开始，深入到对由振动引起的噪声辐射的研究，计算得到相应的声压场，并据此实现对机械振动噪声的虚拟再现。
