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Use of reciprocity principle in a hybrid modeling technique (HMT) based on inverse boundary element method (IBEM) for the determination of the optimal spectral characteristics of a complex radiating noise source

机译:互易原理在基于逆边界元法(IBEM)的混合建模技术(HMT)中用于确定复杂辐射噪声源的最佳光谱特性的用途

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摘要

A robust hybrid modeling technique (HMT) based on near field acoustic measurements combined with numerical results derived from an Inverse Boundary Element Method (IBEM) is presented. The developed hybrid technique takes advantage from reciprocity principle to efficiently determine the optimal spectral characteristics of very complex noise sources, typically encountered in transportation industries. The first section of the paper reminds the direct link between reciprocity principle and integral representations of the acoustic field radiated by a noise source at finite number of discrete points located outside a closed surface enveloping the source. The second section discribes the parameters chosen to describe the radiating source and the numerical optimization procedure used to determine the optimal spectral characteristics of source parameters. The third and last section of the paper gives successful practical applications of the method in automobile industry to characterize the noise radiated by a car engine.
机译:提出了一种稳健的混合建模技术(HMT),该技术基于近场声学测量结果并结合了逆边界元法(IBEM)得出的数值结果。先进的混合技术利用了互惠原理,可以有效地确定运输行业通常遇到的非常复杂的噪声源的最佳频谱特性。本文的第一部分提醒了互易原理与噪声源在位于包围声源的闭合表面之外的有限数量的离散点处辐射的声场的积分表示之间的直接联系。第二部分介绍选择用来描述辐射源的参数以及用于确定辐射源参数的最佳光谱特性的数值优化程序。本文的第三部分和最后一部分给出了该方法在汽车工业中成功实践的应用,以表征汽车发动机辐射的噪声。

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