本文提出了一种计算平板结构辐射噪声的理论和方法。
A theory and method for calculating the noise level radiated by plate are presented in this paper.
基于声传递向量(atv)的概念，研究探讨了AT V技术在内燃机结构辐射噪声仿真预测上的应用方法和途径。
Based on the acoustic transfer vector concept (ATV), the application approach to structural acoustic radiated prediction using the ATV technology for I. c.
基于声传递向量(atv)的概念，研究探讨了AT V技术在内燃机结构辐射噪声仿真预测上的应用方法和途径。
Based on the acoustic transfer vector concept (ATV), the application approach to structural acoustic radiated prediction using the ATV technology for I. C. engine was studied.
对加筋圆柱壳由于肋骨数目改变所引起的结构应力参数变化对辐射噪声的影响进行了探索。
This paper studies the influence of structural stress parameters on the noise radiation of a stiffened cylindrical shell with different rib Numbers.
本文从声学振动理论出发，分析并导出了结构的振动与表面辐射噪声的关系。
In this paper, the relationship between the structure vibration and the surface noise radiation is analyzed and deduced from the acoustic and vibrational theory.
使用ANSYS有限元软件建立带有推进轴系的潜艇尾部结构模型，用直接边界元方法进行潜艇尾部结构水下辐射噪声特性分析。
The finite element model of underwater structure with shafting is built by ANSYS. The characteristics of structural acoustic radiation are investigated by the direct boundary element method.
因此，PCB的电力轨线的结构被简化，从而降低emi辐射噪声。
Thus, the power trace of the PCB is simplified in structure, thereby reducing EMI radiation noise.
改变轴系纵振激励传递途径，在轴系上安装纵振减振器或动力吸振器以降低结构水下辐射噪声。
The structure acoustic radiation caused by longitudinal vibration of shafting is reduced by changing excitation force propagation path and adopting vibration isolator or dynamic vibration absorber.
通过用声强测量系统对水下大型结构体进行了辐射噪声声功率的测定以及噪声源的识别和定位的实验。
The measurement of radiation noises from an underwater structure body and identification and location of noise sources were carried out by using a sound intensity measurement system .
这是因为结构以某一阶模态振动时，将在其辐射噪声频谱上出现一个峰值。
Because the structure vibrates at some modal, a vibration peak value will appear at its noise frequency spectrum.
并分析结构模态对辐射噪声的贡献量。
Contribution of structural modes to the radiation noise is analyzed.
结果表明，研究结构在声辐射模态概念下的噪声特性是船舶降噪研究中的一条新途径。
Results showed that the research under the concept of the acoustic mode is significant in the efforts of reducing the noise level of ships.
本文应用声学仿真的方法对125-C型摩托车变速箱端盖进行结构优化设计，达到降低表面辐射噪声的目的。
In this paper, the acoustic simulation was applied to improve the noise performance of gearbox cover on the motorcycle of 125-C with the low vibro-acoustic structure design.
结果证明，通过结构参数的改变来降低表面辐射噪声是行之有效的。
The results of this paper proved that it is effective to reduce the engine surface noise by changing the structure parameters.
声学-结构灵敏度用于预测结构辐射声压随结构参数的变化，这对低噪声结构设计具有重要指导意义。
In this paper, acoustic-structure sensitivity is used to predict the variation of acoustic pressure with the change of structural parameters.
动力机械的辐射噪声产生于结构表面振动，通过控制振动来控制其辐射噪声是机械工程师长期追求的目标。
The radiated noise of the dynamical mechanism comes from its surface vibration. Controlling the vibration to reduce the radiated noise is a long-term aim for most researchers.
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.
计算空气滤清器在模拟发动机激励下，壳体结构与空气滤清器内部声腔耦合产生的辐射噪声。
The radiation noise by the coupling effect of the filter's case and the interior acoustic chamber is computed when the air filter is excited by the simulated engine force.
总结了非制冷测辐射热计的经典数学模型，并分析了探测器热绝缘结构和噪声对性能的影响，指出了性能改进和优化的基本途径。
This paper describes the classical mathematic model of bolometer, the effect of thermal isolation and noise on detector performance are also discussed.
总结了非制冷测辐射热计的经典数学模型，并分析了探测器热绝缘结构和噪声对性能的影响，指出了性能改进和优化的基本途径。
This paper describes the classical mathematic model of bolometer, the effect of thermal isolation and noise on detector performance are also discussed.
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