【摘要】 本文从弹性力学分区变分原理出发,提出一种新的有限元与边界元的对称耦合方法.与目前通用的超单元形式的对称耦合法相比,本文的方法理论上比较直接,计算上更为经济,易于利用现有的有限元与边界元程序予以实现,也易于推广应用于局部的材料非线性或接触非线性问题,文中通过有限域、无限域及半无限域等问题的算例,对该方法的有效性作了比较全面的验证.更多还原

【Abstract】 The paper presents a new symmetric coupling approach of BEM and FEM,which is based on the sub-region variational principle.In comparison with the superelement symmetric coupling,the new method has the advantages of being more straight in theory and more economical in compu-tation.It is easy to be implemented by using the available programs of FEM and BEM,and easy to be applied to local material nonlinear and contact nonlinear problems.The validity of the proposed approach is demonstrated by examples for the bounded sub-region,infinite region and semi-infinite region.更多还原