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Sound transmission loss behavior of sandwich panel with different truss cores under external mean airflow

机译：外部平均气流作用下不同桁架芯夹芯板的传声损失特性

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This paper presents an analytical study on the sound transmission loss characteristics of sandwich plate with different truss cores under external mean airflow. Three types of truss cores are considered, which include pyramidal core, tetrahedral core and 3D-kagome core. The sandwich plate is immersed in a mean airflow of velocity tangential to the acoustically deformed boundary and it is impinged by a plane sound wave in the incident acoustic field. By applying velocity continuity condition at fluid-structure interfaces, the coupling of fluid-structure interaction is described analytically. The validity and feasibility of the proposed theoretical model are verified by comparisons with numerical simulation results calculated by commercial finite element software (LMS Virtual.lab). Based on the developed theoretical model, the influences of the truss core radius and height. different truss core types, external mean flow and material combination types on sound transmission loss are subsequently presented. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：本文对具有不同桁架芯的夹芯板在外部平均空气流量下的传声损失特性进行了分析研究。考虑了三种类型的桁架芯，包括金字塔形芯，四面体形芯和3D-kagome芯。夹层板沉浸在与声变形边界相切的平均速度气流中，并受到入射声场中平面声波的撞击。通过在流体-结构界面处应用速度连续性条件，分析性地描述了流体-结构相互作用的耦合。通过与商业有限元软件（LMS Virtual.lab）计算的数值模拟结果进行比较，验证了所提出理论模型的有效性和可行性。基于已开发的理论模型，对桁架芯半径和高度的影响。随后介绍了不同的桁架芯类型，外部平均流量和材料组合类型对传声损耗的影响。 （C）2019 Elsevier Masson SAS。版权所有。

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