TWO-DIMENSIONAL COMPUTATIONAL FLUID-STRUCTURE INTERACTION ANALYSIS ON THE WIND INDUCED LARGE STATIC DEFORMATION OF A SUSPENDED MEMBRANE ROOF

Abstract

As the first step of fluid-membrane coupled analysis, wind-induced static deformation of a two-dimensional suspended membrane is computationally studied. The equilibrium shape of the membrane was obtained by coupling two-dimensional finite element analysis of air flow based on Navier-Stokes equation using mixed elements and that of two-dimensional membrane using truss elements. Modified ALE method was used to compute the aerodynamic force efficiently, and the underrelaxation method and the incremental load method with limiter of displacement were used to suppress the numerical instability. The computed results qualitatively agreed with the previous experiment conducted by Okuda et al.