抛物型积分微分方程的无网格Galerkin法
Meshless Galerkin Method for Parabolic Integro-Differential Equations
摘要: 本文针对抛物型积分微分方程,在空间方向上使用无单元Galerkin法离散,在时间方向上使用向后欧拉法离散,利用Nitsche法施加本质边界条件,数值算例验证了该数值格式的有效性和收敛性。
Abstract: This paper focuses on parabolic integro-differential equations, discretized by the element-free Galerkin method in space and the backward Euler method in time, with essential boundary conditions enforced via Nitsche’s method. Numerical examples are provided to verify the effectiveness and convergence of the proposed numerical scheme.
文章引用:张涛. 抛物型积分微分方程的无网格Galerkin法[J]. 理论数学, 2026, 16(9): 25-34. https://doi.org/10.12677/pm.2026.169195

参考文献

[1] Sloan, I.H. and Thomée, V. (1986) Time Discretization of an Integro-Differential Equation of Parabolic Type. SIAM Journal on Numerical Analysis, 23, 1052-1061.
https://doi.org/10.1137/0723073
[2] Thomée, V. and Zhang, N.Y. (1989) Error Estimates for Semidiscrete Finite Element Methods for Parabolic Integro-Differential Equations. Mathematics of Computation, 53, 121-139.
https://doi.org/10.1090/s0025-5718-1989-0969493-9
[3] 张铁. 偏微分-积分方程的有限元方法[M]. 北京: 科学出版社, 2009.
[4] Liu, G.R. (2009) Meshfree Methods: Moving Beyond the Finite Element Method. 2nd Edition, CRC Press.
[5] 程玉民. 无网格方法[M]. 北京: 科学出版社, 2015.
[6] 李小林. 无网格微分方程数值解法[M]. 北京: 科学出版社, 2025.
[7] Belytschko, T., Lu, Y.Y. and Gu, L. (1994) Element‐Free Galerkin Methods. International Journal for Numerical Methods in Engineering, 37, 229-256.
https://doi.org/10.1002/nme.1620370205
[8] Fernández-Méndez, S. and Huerta, A. (2004) Imposing Essential Boundary Conditions in Mesh-Free Methods. Computer Methods in Applied Mechanics and Engineering, 193, 1257-1275.
https://doi.org/10.1016/j.cma.2003.12.019
[9] Nitsche, J. (1971) Über ein variationsprinzip zur lösung von dirichlet-problemen bei verwendung von teilräumen, die keinen randbedingungen unterworfen sind. Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg, 36, 9-15.
https://doi.org/10.1007/bf02995904
[10] Zhang, Q. (2013) Quadrature for Meshless Nitsche’s Method. Numerical Methods for Partial Differential Equations, 30, 265-288.
https://doi.org/10.1002/num.21808
[11] Belytschko, T., Chen, J.S. and Hillman, M. (2024) Meshfree and Particle Methods. Wiley.
https://doi.org/10.1002/9781119811145
[12] Castillo-Rodríguez, C., Saucedo-Zendejo, F.R., García-Lara, A.M., Bouchot-Arias, J.M. and Castruita-Avila, L.G. (2025) Space-Time Meshfree Finite Pointset Method for Thermal Problems with Moving Heat Sources. Engineering Analysis with Boundary Elements, 180, Article 106458.
https://doi.org/10.1016/j.enganabound.2025.106458
[13] Garmanjani, G., Esmaeilbeigi, M. and Cavoretto, R. (2024) Adaptive Residual Refinement in an RBF Finite Difference Scheme for 2D Time-Dependent Problems. Computational and Applied Mathematics, 43, Article No. 39.
https://doi.org/10.1007/s40314-023-02541-1
[14] Bakaev, N.Y., Larsson, S. and Thomée, V. (1998) Backward Euler Type Methods for Parabolic Integro-Differential Equations in Banach Space. ESAIM: Mathematical Modelling and Numerical Analysis, 32, 85-99.
https://doi.org/10.1051/m2an/1998320100851
[15] Xu, D. (2016) The Time Discretization in Classes of Integro-Differential Equations with Completely Monotonic Kernels: Weighted Asymptotic Convergence. Numerical Methods for Partial Differential Equations, 32, 896-935.
https://doi.org/10.1002/num.22035
[16] Hu, S., Qiu, W. and Chen, H. (2020) A Backward Euler Difference Scheme for the Integro-Differential Equations with the Multi-Term Kernels. International Journal of Computer Mathematics, 97, 1254-1267.
https://doi.org/10.1080/00207160.2019.1613529