A meshless method with conforming and nonconforming sub-domains

作者：Guo Yong Ming^*; Yagawa Genki

来源：International Journal for Numerical Methods in Engineering, 2017, 110(9): 826-841.

DOI：10.1002/nme.5431

• sub-domain method
• meshless method
• weak form
• easy integration
• conforming and nonconforming sub-domains

An accurate and easy integration technique is desired for the meshless methods of weak form. As is well known, a sub-domain method is often used in computational mechanics. The conforming sub-domains, where the sub-domains are not separated nor overlapped each other, are often used, while the nonconforming sub-domains could be employed if needed. In the latter cases, the integrations of the sub-domains may be performed easily by choosing a simple configuration. And then, the meshless method with nonconforming sub-domains is considered one of the reasonable choices for computational mechanics without the troublesome integration. In this paper, we propose a new sub-domain meshless method. It is noted that, because the method can employ both the conforming and the nonconforming sub-domains, the integration for the weak form is necessarily accurate and easy by selecting the nonconforming sub-domains with simple configuration. The boundary value problems including the Poisson's equation and the Helmholtz's equation are analyzed by using the proposed method. The numerical solutions are compared with the exact solutions and the solutions of the collocation method, showing that the relative errors by using the proposed method are smaller than those by using the collocation method and that the proposed method possesses a good convergence.

• 出版日期2017-6-1