A spectral-element/finite-element analysis of a ship-like structure subjected to an underwater explosion
A spectral-element/finite-element analysis of a ship-like structure subjected to an underwater explosion
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DOI：
10.1016/j.cma.2005.03.007
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发表时间：
2006-03
影响因子：
7.2
通讯作者：
M. Sprague;T. L. Geers
中科院分区：
文献类型：
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作者：
M. Sprague;T. L. Geers
通过对一个31，000自由度的船形结构有限元模型的瞬态响应的研究，证明了一种改进的模拟水面舰船对水下爆炸响应的方法的实用性。流体模型采用不同阶数的谱元，将空化流体模拟为具有双线性体积模量的非线性声学介质。流体自由度的数量从105到107不等。还研究了戏剧性的网格截断的可行性，这是必不可少的程序的可行性。结果表明，有用的模拟可以在现代PC上进行时，所有的资源节约的改进被充分利用。
The practicability of an improved procedure for simulating the response of a surface ship to an underwater explosion is demonstrated by examining transient responses for a 31,000-degree-of-freedom finite-element model of ship-like structure. The fluid model employs spectral elements of various order, and models the cavitating fluid as a nonlinear acoustic medium with a bilinear bulk modulus. The number of fluid degrees of freedom ranges from 105to 107. Also studied is the viability of dramatic mesh truncation, which is essential to the feasibility of the procedure. The results indicate that useful simulations may be performed on a modern PC when all of the resource-conserving improvements are fully exploited.