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工程力学  2014 

等横截面无限声学水域的连分式公式

, PP. 41-45

Keywords: 比例边界有限元法,连分式,无限水域,瞬态分析,坝库耦合

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Abstract:

基于比例边界有限元法连分式理论,提出了等横截面无限声学水域的连分式公式,推导了高频连分式公式与双渐近连分式公式,比较了连分式公式与动态质量矩阵模拟等截面无限水域的计算效率,发现前者效率优于后者。利用该公式分析了等截面无限声学水域在顺河向激励下的瞬态响应。数值模拟结果表明高频连分式公式的稳定性与收敛性有待改进,而双渐近连分式则具有更好的稳定性和收敛性,能正确模拟等截面无限水域。

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