TY - EJOU
AU - Rabczuk, Timon
AU - Ren, Huilong
AU - Zhuang, Xiaoying
TI - A Nonlocal Operator Method for Partial Differential Equations with Application to Electromagnetic Waveguide Problem
T2 - Computers, Materials \& Continua
PY - 2019
VL - 59
IS - 1
SN - 1546-2226
AB - A novel nonlocal operator theory based on the variational principle is proposed for the solution of partial differential equations. Common differential operators as well as the variational forms are defined within the context of nonlocal operators. The present nonlocal formulation allows the assembling of the tangent stiffness matrix with ease and simplicity, which is necessary for the eigenvalue analysis such as the waveguide problem. The present formulation is applied to solve the differential electromagnetic vector wave equations based on electric fields. The governing equations are converted into nonlocal integral form. An hourglass energy functional is introduced for the elimination of zero-energy modes. Finally, the proposed method is validated by testing three classical benchmark problems.
KW - Nonlocal operator method
KW - Variational principle
KW - Nonlocal operators
KW - Hourglass mode
DO - 10.32604/cmc.2019.04567