List of Articles stiffness matrix Open Access Article Abstract Page Full-Text 1 - A new model as a damage index in an eigen value problem with application in health monitoring of offshore jacket platform Mehdi Alavinejhad Madjid Ghodsi Hassanabad Mohammadjavad Ketabdari Masoud Nekooei Open Access Article Abstract Page Full-Text 2 - Spectral Finite Element Method for Free Vibration of Axially Moving Plates Based on First-Order Shear Deformation Theory M.R Bahrami S Hatami Open Access Article Abstract Page Full-Text 3 - Coupled Bending-Longitudinal Vibration of Three Layer Sandwich Beam using Exact Dynamic Stiffness Matrix A. Zare B Rafezy W.P Howson Open Access Article Abstract Page Full-Text 4 - Free and Forced Transverse Vibration Analysis of Moderately Thick Orthotropic Plates Using Spectral Finite Element Method M.R Bahrami S Hatami Open Access Article Abstract Page Full-Text 5 - Vibration inverse problem for spring-mass systems محمدرضا تابش پور