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首页> 外文会议>International conference on vibration, structural engineering and measurement >Element Grouping Method for the Calculation of Dynamic Response and Acoustic Radiation from an Underwater Structure
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Element Grouping Method for the Calculation of Dynamic Response and Acoustic Radiation from an Underwater Structure

机译：计算水下结构动力响应和声辐射的元素分组方法

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A modification of traditional FEM/BEM called element grouping method (EGM) is proposed to calculate the elastic vibration and acoustic field radiated from an underwater structure. Instead of rebuilding the structure using coarse FEs to save the computational time and data storage, the structural FEs on the coupled surface are grouped into clusters of BEs to reduce the number of fluid DOF. With the grouped elements (GEs) used as BEs, the problem of nonmatching between fluid DOFs and structural DOFs is solved. The approach is illustrated and validated using known analytic solutions for submerged spherical shells subjected to uniformly applied incident pressure. Acoustic radiated from a ribbed cylindrical shell driven by a force is predicted by using different element grouping styles. Comparison between numerical and experimental results shows that fine grouped elements give a high computation efficiency and more efficient data storage saving.
机译：提出了对传统FEM / BEM的一种改进，称为元素分组法（EGM），以计算从水下结构辐射出的弹性振动和声场。与其使用粗糙的有限元重建结构以节省计算时间和数据存储，不如将耦合表面上的结构有限元分组为BE簇，以减少流体自由度的数量。通过将分组元素（GE）用作BE，解决了流体自由度和结构自由度之间不匹配的问题。使用已知的解析方法对采用均匀施加的入射压力的浸入式球形壳体的方法进行了说明和验证。通过使用不同的元素分组样式，可以预测由力驱动的带肋圆柱壳辐射出的声波。数值结果与实验结果的比较表明，精细分组的元素具有较高的计算效率和更有效的数据存储节省。

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