%0 Journal Article %T Three Dimensional Natural Frequency Analysis of Sandwich Plates with Functionally Graded Core Using Hybrid Meshless Local Petrov-Galerkin Method and Artificial Neural Network %A Nazari, Foad %A Abolbashari, Mohammad Hossein %A Hosseini, Seyed Mahmoud %J Computer Modeling in Engineering and Sciences-CMES %@ 1526-1492 %D 2015