声辐射

利用PVDF压电膜设计声辐射模态传感器

Design of sound radiation mode sensors by using PVDF piezoelectric film

通过PVDF传感器测量振动板结构的声辐射模态伴随系数

Measurement of the adjoint coefficient of sound radiation using PVDF sensors for a vibrating structure

随机振动声辐射计算的三次B样条插值的统计边界元法

Calculation on the Acoustic Radiation Problem Caused by Random Vibrating Body by the Statistical Boundary Element Method Using Cubic B - Spleen Interpolating Function

利用PVDF设计两维简支结构声辐射模态传感器

Design of Radiation Mode Sensor of Two-Dimensional Simple-Supported Structure Using PVDF Film

PVDF声辐射模态传感器设计中的关键问题研究

On Improving the Method for Designing Acoustic Radiation Mode Sensor Using PVDF Films

通过PVDF测量简支梁声辐射模态伴随系数

The Measuring of Weight Coefficient of Sound Radiation from Simply Supported Beams by Using PVDF

并且用ANSYS分析了某些特定频率的振动情况以及在远声场的声辐射特性。

The vibration instances at some special frequencies are analyzed and the sound radiation characteristics at far sound field are calculated by ANSYS .

还利用CAE软件结果的可移植性，考虑了半封闭加筋圆柱结构内外分布不同介质时，实现了双边耦合振动声辐射分析求解。

The examples actualize analysis of bilateral coupled vibration and acoustic radiation by using transitivity of CAE software results .

本文利用声辐射模态的特性，通过抵消前k阶声辐射模态伴随系数的控制策略，以四面简支板为研究对象，在声辐射模态领域首次建立了该物体的状态空间数学模型。

In this paper , the state equation of simply supported rectangular panel is established by using the control strategy that is canceling the first k radiation modes .

该文在声辐射模态理论及一维分布式压电传感器方程基础上，以Fourier级数展开的方法，给出了梁结构PVDF传感器形状与边界条件无关的设计方法。

Using the theory of radiation modes and the piezoelectric equation , a Fourier series expansion method is presented to design the PVDF sensors .

计算结果表明压铸BMC气门室罩在主要频率区间比用铸铝气门室罩声辐射功率低，有降噪作用。

Calculation indicates that the noise from engine valve cover at main frequency range is reduced when using BMC .

在振动平板上测量少数点振动速度分布，利用声辐射模态性质，通过求解欠定方程，得到所需要的前N阶声辐射模态伴随系数。

By measuring the vibrating velocity distributions at a few points of the plate and solving the underdetermined equations of the radiation mode expansion , the adjoint coefficients of the first N radiation modes can be obtained .

基于声辐射模态的ASAC鲁棒控制器的设计研究

Design of Robust Controller in ASAC Based on the Radiation Modes

并在此Hilbert空间中，定义了一个包含声辐射性质并且是线性自伴正的算子。

And in the Hilbert space , an operator is defined , which includes the radiation property of the vibrating surface and is linear , self-adjoint and positive .

基于H∞控制理论，建立了结构振动声辐射鲁棒反馈控制模型，利用混合灵敏度设计方法，将鲁棒反馈控制器设计问题转化为标准H∞控制问题求解。

Based on the H ∞ control theory , the feedback robust control model of Structural_Acoustic system is presented in the paper . The mixed sensitive design method is used to design the robust H ∞ controller of vibration system .

应用SEA对车内噪声输入功率进行了排序，识别出了车内噪声主要输入板件。从声辐射与透射的角度识别出车内高频的主要噪声源。

Sorting the input power of interior noise with SEA , the main input panels of the interior noise was identified , and the main the main high-frequency noise sources inside the car ware identified from the perspective of sound radiation and transmission .

还将主分量分解和Kriging模型相结合建立了可对整个计算频段内的振动声辐射响应进行预测的代理模型。

The principal component decomposition is combined with the Kriging model to construct a surrogate model for predicting vibro-acoustic response in the frequency band of interest .

对于由Helmholtz方程描述的声辐射问题，可建立对应的边界表面积分方程，但此方程在特征频率时其解不唯一。

For those governed by Helmholtz 's equation a boundary surface integral equation is derived , however it has no unique solution at characteristic frequencies .

最后应用MATLAB软件对单输入单输出（SISO）系统进行了仿真，利用最优控制方法对第一阶声辐射模态伴随系数进行了控制，达到了减低声功率的目的，验证了所建立的系统数学模型。

At last , using Matlab software to confirm the availability of the state equation of SISO ( single in single out ) system by controlling the first radiation mode through optimal control .

基于声辐射模态理论进行ASAC控制系统中的一个重要内容就是获得声辐射模态伴随系数。

It is important in ASAC system based on acoustic radiation modes to obtain adjoint coefficient of the radiation modes .

本文将修正的Helmholtz边界积分方程和结构有限元相结合，建立一种求解结构声辐射及物面动响应（包括物面法向速度和压力分布）的矩阵分析方法。

Based on the modified Helmholtz integral equation and the structural finite element method , a matrix analytic method is presented for predicting the acoustic radiation and the dynamic responses of a submerged structure .

弹性物体、激励力和声环境形成一个振动声辐射系统，辐射效率σ（rad）建立了振动与声之间的桥梁。

A vibration-sound radiation system consists of clastic body , stimulative force and sound environment . The radiation efficiency σ _ ( rda ) builds up a bridge between the vibration and the sound .

自八十年代后期以来，为了更为有效地降低结构声辐射，人们提出了主动结构声学控制（ASAC）。

In order to reduce sound radiation of a structure , the method of Active Structural Acoustic Control ( ASAC ) was developed in the 1980s .

使用功率流有限元法（PFFEM）分析结果发展声辐射预测程序。

The sound radiation prediction program is developed using the power flow finite element method ( PFFEM ) analysis result .

为验证振动响应结果的合理性，进行了发电机振动测试实验。最后将电磁振动相应结果导入LMSVirtual.Lab中，应用瞬态边界元法进行电磁声辐射计算，得到各振动响应的声辐射结果。

The generator vibration tests were done and that prove the rationality of electromagnetic vibration response . Lastly , electromagnetic vibration response results were imported to LMS Virtual . Lab and transient boundary element method is used to calculate electromagnetic acoustic radiation and the sound radiation results were achieved .

然后结合SYS-NOISE软件和AUTOSEA软件分别计算壳体在流场中声辐射效率在低频段和高频段时的频率响应。

Then , the radiation efficiency at low frequency and frequency response at high frequency in fluid are computed respectively by both SYSNOISE software and AUTOSEA software .

利用分层三角法函数和修正的PEAQ方法，建立了一般形式的正交加筋板结构声辐射及其声响度解析模型。

Based on the hierarchical trigonometric functions and the corrected PEAQ method , the sound loudness radiated from different stiffened plates and the effects of the stiffeners ' form are studied , respectively .

结构声辐射分析的全特解场边界元方法

All Particular Solution Boundary Element Method Analyzing Sound Radiation by Structure

水中阻尼复合箱体结构的振动声辐射特性研究

A study on vibro-acoustical characteristics of damped composite shells in water

基于声辐射模态讨论声能量辐射与传递

Discussion about radiation and transfer of acoustic energy by radiation modes