A new fluid-structure coupling model: Case of a pipe under internal pressure

This work presents the eigenfrequencies of a study on fluid-structure interaction for pipe with circular section, under pressure constraints in laminar, incompressible and irrotational flow, followed by comparison between stiffness coupling bar different geometric ratio Radius/Length; Radius/Thickness, as frequency identity industry. The realization this is to have better coupling, where we use relations mechanical behaviour solid displacement-stress fluid, Navier-Stokes equations cylindrical coordinates speed-stress form transformed into displacement Galerkin-Temp theory. Either force fluid will be distributed internal surface cylinder (interface) solid. To obtain results used hierarchical finite element method (HFEM) both entities. For natural frequencies, apply elements Legendre polynomial which defined well-known interval, thanks mathematical calculation arrive at general motion matrix solid, interface fluid. was carried out MATLAB programme determines evolved system physical parameters mentioned. We validated table experimental values programme.