摘要
针对使用边界元方法计算波浪对结构物作用问题中所出现的"不规则频率"现象,对比了直接法与迭代法求解线性方程组时"不规则频率"的影响范围。并基于修改积分区域方法消除"不规则频率"的积分方程,研究了求解方法对"不规则频率"消除效果的影响。计算结果表明,采用迭代法求解会使"不规则频率"的影响范围显著增加,也会影响"不规则频率"的消除效果。因此,推荐使用直接法对线性方程组进行求解。
The direct and iterative solvers are employed in ordinary boundary integral element method and the modified integral domain method of removing irregular frequency respectively.The affecting ranges and removing results of irregular frequency are compared.Numerical results show that the affecting ranges by irregular frequency become large if the iterative solver is used.The effect of irregular frequency could not be removed if the iterative solver is employed.In conclusion,the direct solver is recommended to solve the linear equations in frequency analysis.
出处
《水运工程》
北大核心
2010年第7期22-26,共5页
Port & Waterway Engineering
基金
国家自然科学基金(10772040
50709005
50921001)
国家重大专项(2008ZX05026-02-02)
关键词
波浪力
不规则频率
高阶边界元
直接法
迭代法
wave force
irregular frequency
higher-order boundary element method
direct solver
iterative solver
