1) acoustic mode
声模态
1.
Acoustic modes of the combustion chamber were calculated with FEM software ANSYS when the length and number of baffles change,and the influences of the changes on the acoustic modes are compared.
利用ANSYS软件数值计算了隔板长度变化以及隔板数目变化时,对应的燃烧室声模态,并比较了它们的变化对燃烧室声模态造成的影响。
2.
Analysis is done to compare the results of acoustic model analysis with the excitation frequency characteristics of both inside and outside of the car,which provides the evidence for the cab noise prediction and the acoustic characteristic i.
采用Hypermesh软件建立了某车型的室内声场有限元模型,用SYSNOISE软件对该有限元模型进行自由模态分析,得到声场的各阶模态频率和振型,将声模态分析结果与汽车内外部的激励源频率特性进行对比,为改善车内声学特性,对车内噪声预测提供了参考。
2) acoustic modality
声学模态
1.
A measuring method of acoustic modality of a car cavity is put forward to acquire its modal frequencies and modal shapes using LMS Test_lab software after gathering and analyzing test data of a real car.
介绍了轿车车内空腔声学模态,对实车的声模态进行了测试与分析,获得了车内空腔的声学共鸣频率和模态形状;提出了利用LMSTest_lab对轿车车内空腔声学模态进行测试的试验方法,为车内空腔的低频噪声研究提供了参考。
2.
This topic introduces the acoustic modality of car cavity,presents a kind of testing method to acquire the modal frequency and compares the test result with the result of Finite Element Analysis (FEA).
阐述了轿车车内空腔声学模态 ,为了获取车内空腔的声学共鸣频率 ,提出了一种空腔声学模态试验方法 。
3.
The acoustic modality of the enclosed cylindrical volute casing with asound-soft boundary and the mathematical modals at a higher order acoustic modal frequencyfor the volute casing of a centrifugal fan with a practical.
根据离心风机蜗壳的结构特点，将其简化为一圆柱体，并００在分析声刚性蜗壳的声学模态的基础上，研究了蜗壳声软边界壁面引起蜗壳声学特性的变化，并由此得到了封闭声软边界圆柱体田壳的声学模态和具有开孔的实际声软边界离心风机蜗壳高阶声学模态频率的数学模型。
3) acoustic mode
声学模态
1.
Since there are some connection between the acoustic mode and the combustion instability,it is necessary to analyze acoustic modal of the aero-engine annular chamber flame tubes.
分别对常温常压下和高温高压下燃烧室火焰筒的声学模态进行了分析,获得了相应的声学固有频率和振型,为发动机燃烧室结构抗疲劳设计提供了参考。
2.
And there are some connections between the acoustic mode and the combustion instability.
本文应用有限元方法,对某型航空发动机环形燃烧室火焰筒的振动模态和声学模态进行了研究,获得了相应的固有频率和振型,并完成了声学测量实验验证。
5) radiation modes
声辐射模态
1.
Application of piezoelectric actuators in ASAC based on radiation modes;
压电作动器在基于声辐射模态的ASAC中的应用
2.
Measurement of adjoint coefficient of radiation modes for vibrating plate;
振动板声辐射模态伴随系数的测量
3.
A new piezoelectric sensor design for a clamped-clamped plate is presented to measure its amplitudes of the first three radiation modes.
以固定支撑板为例,提出一种阵列式压电式传感器的设计方法测量前三阶声辐射模态幅值。
6) Modal Acoustic Emission
模态声发射
1.
Based on the wavelet transformation and the theory of modal acoustic emission,the dispersion of guided wave propagated in thin plate was investigated by acoustic emission experiment.
基于小波变换和模态声发射理论,通过模态声发射试验的方法确定了管道中导波传播的频散特性。
2.
In the paper, the modal acoustic emission(MAE) thchnique rapidly developed in recent years, is properly introduced to more precisely acquire the actual AE signal waveform, which can be trusted to truly reflect.
使用近几年来得到迅速发展的模态声发射技术真实地获取疲劳裂纹的声发射波形,使接收到的声发射信号较完整地反映了声发射源的物理状态。
3.
Emphasis is given to the ultrasonic guided wave technology and modal acoustic emission technology, including the propagation characteristic of guided waves, the method of experiment and numerical simulation etc.
着重对超声导波技术和模态声发射技术在管道检测中的最新应用进行了评述 ,内容涉及超声导波的传播特性、实验检测方法及其数值模拟等 。
补充资料：声态
1.指人的声音和情态。
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