研究推荐 | 轴向柱塞泵壳体降噪区域识别

本栏目旨在不拘泥于内容的限制，以点带面，介绍流控领域不同的研究方向、课题以及优秀的作者和团队，为广大读者及研究人员提供新鲜的研究思路，为作者及团队提供展示平台。

本期为各位读者推荐《轴向柱塞泵壳体降噪区域识别》，并向各位读者介绍该课题的研究背景、取得成果以及研究团队。

为了精确识别轴向柱塞泵壳体降噪区域，首先，搭建液压-多体动力学耦合模型，求解结构噪声激振力；然后，分析零部件模态并试验验证，建立装配体有限元模型，开展基于模态的振动响应分析，通过振动实验验证模型准确性，搭建轴向柱塞泵声学边界元模型，分析其辐射噪声特性；最后，基于声学传递向量原理，开展模态及板面声学贡献量分析，对壳体噪声辐射板面进行合理划分，分析其对关键频率下辐射噪声的贡献量。研究表明：轴向柱塞泵振声模型具有良好的准确性；某板面在辐射噪声突出的1350 Hz频率下，其声学贡献量达到46.1%。精确识别了轴向柱塞泵壳体降噪区域，为其降噪优化设计提供有效指导。

In order to identify the noise-reduction region of pump shell, firstly, the hydraulic-multibody dynamic coupled model is established to obtain structural noise excitation force. Then modal analysis and experimental verification of each part are performed, and assembled finite element model is established; modal-based vibration response analysis is performed, and the accuracy of the model is verified by vibration experiments; radiated noise characteristics are analyzed based on the developed acoustic model. Finally, modal-and panel-acoustic contribution analysis are performed based on the theory of acoustic transfer vector, the pump shell panel contributing to noise radiation is reasonably divided, and the panel contribution to noise at the key frequency is analyzed. The results shown that the vibro-acoustic model has good accuracy, and one panel is found to have 46.1% contribution to the protruded radiated noise at the key frequency of 1350 Hz. This study accurately identified the noise-reduction region of shell for the axial piston pump, and provided efficient guidance on design optimization for noise reduction.

■ 轴向柱塞泵；振声模型；声学贡献量分析；降噪区域识别

■axial piston pump, vibro-acoustic model, acoustic contribution analysis, identification of noise-reduction region

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