噪声辐射

在高频范围的噪声辐射也可通过此方法控制（图11和图12）。

The noise emission can be also controlled in this way in high frequency range ( Fig.11 and Fig.12 ) .

用表面Helmholtz积分方程计算离心通风机噪声辐射

Calculating Noise Radiation of Centrifugal Fan Using Helmholtz Integral Equation

通过ANSYS进行模态分析，研究了阻尼车轮/钢轨的振动特性，指出其主要的振动特点以及在其结构中噪声辐射的主要部位。

Vibration performance of damped wheel / rail is modally analyzed with ANSYS , which shows the main characteristics of vibration and the Primary noise radiation source in them .

智能水雷声引信、目标低噪声辐射声场测量和港口目标声特性监测等场合均关注近程（2Km以内）声场。

Near distance acoustic fields are payed attention in intelligent acoustic mine and the measurement of tranquil targets ' radiate field and acoustic feature monitor of targets in the haven , etc.

煤矿风井轴流风机气流速度大，扩散口噪声辐射强度高达113dB（A），降噪难度较大的低频成份突出。

Noise level as high as 113dB ( A ) generated by air current of axial flow fan at the outlet of ventilation shaft of a coal mine poses big environment problems .

行驶车辆噪声辐射研究进展及展望

Review and Prospect in Research of Sound Field from Moving Vehicle

采用FEM/BEM法对管道噪声辐射仿真分析研究

Simulation and Analysis of Pipe Noise Radiation with FEM / BEM

火电厂球磨机筒体噪声辐射分析

Analysis of noise radiation of ball grinder for thermal power plant

用边界单元法计算离心风机噪声辐射

Boundary element method used for the calculation of centrifugal fan noise radiation

轮轨振动与噪声辐射研究

The Research on Wheel and Track Vibration and Noise Radiation

掠形叶片轴流叶轮旋转频率噪声辐射的理论研究

Theoretical Investigation of Rotating Frequency Noise with Axial Fan of Skewed Blade

火箭发动机气动噪声辐射特性实验研究

Experimental Study on Radiation Characteristics of Rocket Engine Jet Noise

混合式脉冲爆震发动机噪声辐射特性研究

Research on Noise Radiation Characteristics of Hybrid Pulse Detonation Engine

海水管路模拟系统进出水管口噪声辐射特性研究

Radiation Characteristics of Noise from Inlet and Outlet of Seawater Piping System

发动机油底壳振动与噪声辐射研究

Study on the Vibration and Acoustic Radiation of the Oil Pan of Engine

齿轮啮合噪声辐射特性研究

A study on radiation property of gear meshing noise

摩托车发动机壳体噪声辐射数值分析

Numerical analysis of noise radiation from motorcycle engine shell

齿轮传动加速度噪声辐射机理研究

Research on acceleration noise radiation from gear transmission

船舶螺旋桨空化噪声辐射的逆问题

Inverse problem of ship propeller cavitation noise radiation

利用声全息方法分析运动声源的噪声辐射。

This paper presents the acoustical holography method for the identification of moving sound source .

尾管中强脉动排气噪声辐射的特征线解

Analysis of noise radiation of a strongly pulsating tailpipe exhaust by the method of characteristics

摩托车的噪声辐射和有毒气体排放是当前比较突出的交通污染。

Currently , it is a prominent traffic pollution problem due to motorcycle noise and exhaust emission .

[η]，定性讨论了这些参数对球状泡噪声辐射的影响。

The effect of these parameters on noise radiation of spherical bubble is qualitatively discussed as well .

对脉冲爆震发动机模型机在不同爆震频率下的噪声辐射特性进行研究。

The noise radiation characteristics of a pulse detonation engine model were investigated under several operation frequencies .

用激光、标准噪声辐射源及热电器件实现的实时测温系统

Accuracy-Measurement Instrument for Temperature and Emissivity Using Lasers and Standard Heat-noise Radiating Source and Pyroelectric Detector in Real-time

壳体厚度越厚，壳体的噪声辐射就越低；

The sound radiation can decrease along with thickness of shell increased as well as damp of shell ;

结果表明，桨涡干扰中的超声速噪声辐射源点在一定的飞行状态下会成为主导的噪声源。

It is shown that the BVI transonic noise radiation sources in flight should be the leading factor .

异步电动机转子偏心会引起一系列低次数径向力波，并使噪声辐射增加。

Rotor eccentricity in asynchronous motor always arose a series of low-order radial force wave and increase noise radiation .

结果表明，对内燃机薄壳结构进行声学优化，可以大大减小噪声辐射。

The result shows that acoustic optimization of thin shells of Engine samp may reduce perfectly the radiated noise .

径向力作用下壳体噪声辐射最大，切向力次之，而轴向力最小；

Radial force can bring maximum sound radiation , and sound power is the minimum when axial force is applied ;