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Computational Mechanics

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23-05-2019 | Original Paper

A gradient reproducing kernel collocation method for high order differential equations

Authors: Ashkan Mahdavi, Sheng-Wei Chi, Huiqing Zhu

Published in: Computational Mechanics | Issue 5/2019

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Abstract

The High order Gradient Reproducing Kernel in conjunction with the Collocation Method (HGRKCM) is introduced for solutions of 2nd- and 4th-order PDEs. All the derivative approximations appearing in PDEs are constructed using the gradient reproducing kernels. Consequently, the computational cost for construction of derivative approximations reduces tremendously, basis functions for derivative approximations are smooth, and the accumulated error arising from calculating derivative approximations are controlled in comparison to the direct derivative counterparts. Furthermore, it is theoretically estimated and numerically tested that the same number of collocation points as the source points can be used to obtain the optimal solution in the HGRKCM. Overall, the HGRKCM is roughly 10–25 times faster than the conventional reproducing kernel collocation method. The convergence of the present method is estimated using the least squares functional equivalence. Numerical results are verified and compared with other strong-form-based and Galerkin-based methods.

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Title: A gradient reproducing kernel collocation method for high order differential equations
Authors: Ashkan Mahdavi
Sheng-Wei Chi
Huiqing Zhu
Publication date: 23-05-2019
Publisher: Springer Berlin Heidelberg
Published in: Computational Mechanics / Issue 5/2019
Print ISSN: 0178-7675
Electronic ISSN: 1432-0924
DOI: https://doi.org/10.1007/s00466-019-01724-0

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