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A weak-form meshfree coupled with infinite element method for predicting acoustic radiation

机译：弱形式无网格耦合无限元方法预测声辐射

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摘要

To improve the computational accuracy and eliminate the element matching in the traditional method based on the finite and infinite elements, the coupling of the meshfree weak-form method with the variable order infinite acoustic wave envelope element (WEE) is studied in this paper and achieved by forming continuous acoustic shape function on an artificial interface, by which the infinite domain is divided into two subdomains where the meshfree and WEE methods are applied respectively. A coupled meshfree weak-form method is developed for use in predicting acoustic radiation in infinite domain. A key feature of the present method is the ability of properly modelling the amplitude decay of the outgoing travelling wave and significantly improving the prediction accuracy. The impacts of the meshfree shape function approximation/interpolation scheme and the space scale of the region used for the coupling on the proposed method are investigated. Simulation and experiment are performed to test the applicability and performance of the method, and show that the method is a valuable approach for predicting exterior acoustic radiation in infinite domain.
机译：为了提高计算精度并消除基于有限元和无限元的传统方法中的元素匹配，本文研究了无网格弱形式方法与可变阶无限声波包络单元（WEE）的耦合，并实现了通过在人工界面上形成连续的声学形状函数，将无限域划分为两个子域，分别应用无网格和WEE方法。开发了一种无网格耦合的弱形式方法，用于预测无限域中的声辐射。本方法的关键特征是能够正确地模拟输出行波的幅度衰减并显着提高预测精度的能力。研究了无网格形状函数逼近/插值方案以及用于耦合的区域的空间尺度对所提出方法的影响。通过仿真和实验验证了该方法的适用性和性能，表明该方法是一种在无限域内预测外部声辐射的有价值的方法。

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  • 来源
    《Engineering analysis with boundary elements》 |2019年第10期|63-78|共16页
  • 作者

    Wu Shaowei; Xiang Yang;

  • 作者单位

    Chongqing JiaoTong Univ Sch Shipping & Naval Architecture Chongqing 400074 Peoples R China|Wuhan Univ Technol Sch Energy & Power Engn Wuhan 430063 Hubei Peoples R China;

    Wuhan Univ Technol Sch Energy & Power Engn Wuhan 430063 Hubei Peoples R China|Wuhan Univ Technol Key Lab High Performance Ship Technol Wuhan 430063 Hubei Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Acoustic; Meshfree; Weak-form; Infinite domain;

    机译：声学无网格弱形式无限域;

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