STUDY OF DYNAMIC RESPONSE OF ORTHOTROPIC MEMBRANE STRUCTURE UNDER IMPACT LOAD BASED ON MULTIPLE SCALE PERTURBATION METHOD

Abstract

THIS PAPER INVESTIGATES THE DYNAMIC RESPONSE OF RECTANGULAR PRESTRESSED MEMBRANE SUBJECTED TO CONCENTRATED IMPACT LOAD BASED ON MULTIPLE SCALE PERTURBATION METHOD. THE GOVERNING EQUATIONS OF MOTION OF NONLINEAR VIBRATION ARE DERIVED BASED ON THE FÖPPL LARGE DEFLECTION THEORY, AND UNCOUPLED BY MEANS OF GALERKIN METHOD.BY INTRODUCING DIFFERENT TIME SCALES TO CONSIDER THE PROCESS OF VIBRATION, THE RESULTS OF DYNAMIC RESPONSE ARE OBTAINED BY APPLYING THE MULTIPLE SCALE PERTURBATION METHOD. ADDITIONALLY, THE THEORETICAL RESULTS ARE COMPARED WITH THE EXPERIMENTAL DATA IN LITERATURE TO IDENTIFY THE RELIABILITY OF THEORY MODEL. FURTHERMORE, THE EFFECTS OF PRETENSION FORCE, VELOCITY OF LOAD AND DIMENSION OF MEMBRANE ON THE DYNAMIC RESPONSE OF MEMBRANE ARE DISCUSSED. THE PRESENT WORK STUDIES THE PROBLEM OF THE DYNAMIC RESPONSE OF PRESTRESSED MEMBRANE SUBJECTED TO CONCENTRATED IMPACT LOAD IN DIFFERENT TIME SCALES, AND PROVIDES A MORE ACCURATE THEORETICAL MODEL FOR DESIGN OF MEMBRANE STRUCTURE.