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中文摘要：
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。
英文摘要：
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.
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