1) emission noise property
辐射噪声特性
1.
On the basis of comparative analysis of the test data of emission noise,it also sums up the emission noise property of high-speed trains with no more than 250 km/h.
总结了高速铁道车辆辐射噪声的来源,设计并进行了高速车辆辐射噪声试验,在对比分析辐射噪声数据的基础上,总结了速度不超过250 km/h的高速列车车外辐射噪声特性。
2) sound radiation characteristic
声辐射特性
1.
Study on influencing factors for sound radiation characteristics of finite length cylindrical shells;
有限长圆柱壳体声辐射特性影响因素研究
3) radiated noise
辐射噪声
1.
Experimental research on surface-radiated noise of turbo-charged diesel engine at different altitudes;
不同海拔下涡轮增压柴油机表面辐射噪声试验研究
2.
Study on underwater target radiated noise modulated information extraction method;
水中目标辐射噪声调制信息提取方法研究
3.
Study on the non-linearity of the underwater radiated noise;
舰船水下辐射噪声非线性特性研究
4) noise radiation
噪声辐射
1.
Numerical analysis of noise radiation from refrigerator compressor shell;
冰箱压缩机壳体噪声辐射数值分析
2.
Numerical analysis of noise radiation from motorcycle engine shell
摩托车发动机壳体噪声辐射数值分析
3.
Some methods which can reduce the noise radiation of shell effectively were given out.
压缩机的噪声辐射是通过壳体的振动辐射出去,为了降低压缩机的噪声,并进一步优化壳体的声学特性,利用数值模拟方法,在合理简化模型的基础上,进行了壳体模态分析。
5) sound radiation
辐射噪声
1.
On classification of underwater vibrating object sound radiation level based on RBF neural network;
基于径向基神经网络的水下振动物体辐射噪声级别分类研究
2.
This paper presents a study on the relationship between vibration and sound radiation from submerged cylindrical shell.
通过对两个加筋圆柱壳结构的振动与辐射噪声关系的数值分析,讨论了结构测点加速度与辐射噪声之间的相互关系,结果表明结构测点加速度与辐射声功率和辐射声压之间并非单调关系。
3.
The sound power level and spectrum of sound radiation of centrifugal compressor,type DHP40-4,are analyzed by artificial neural network,and the max.
采用人工神经网络技术分析了DHP40 -4型离心式压缩机辐射噪声声功率级及其噪声频谱分布规律 ,应用模拟退火算法对压缩机噪声最大值进行了预测 ,结果表明该型压缩机噪声最大值在 2 0 0 0Hz附
6) radiation noise
辐射噪声
1.
Numerical simulation of dynamic response and radiation noise of gearbox
齿轮箱动态响应及辐射噪声数值仿真
2.
Line spectrum provide significant distinct information in radiation noise of underwater target.
线谱是水中目标辐射噪声中重要的特征信息,在被动声呐系统中,线谱提取是水中目标识别的关键技术。
3.
With the classical Johnson noise, 1/f noise and radiation noise, the dependence of noise and Signal-to-Noise on different parameters were simulated.
针对微测辐射热计中的约翰逊噪声、1/f噪声与辐射噪声,着重探讨了微测辐射热计的偏置电压、电阻、噪声带宽等参数对其噪声和信噪比的影响,并根据分析仿真结果,提出了三种增加微测辐射热计信噪比的方法。
补充资料：声特性阻抗
声特性阻抗
物理学术语。关于介质声学特性的物理量。在超声诊断领域简称声阻抗。声波在介质中某点的有效声压与通过该点的有效质点速度的比值。又可用介质的密度与声速的乘积来表示。声波经均质性介质时基本按直线持续传播；声波经两种介质时，其声阻抗差超过0.1%即产生声学界面，引起反射。脉冲反射式超声诊断仪显示的人体组织断面声像，实质上是人体组织中声阻抗差别的空间分布图。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条