A Fluid-Structure Interaction (FSI) simulation is carried out for GE 1-1/2 stage high speed compressor using the Delayed Detached Eddy Simulation (DDES) based on the Spalart-Allmaras (SA) turbulence model. The structural motion equations and the unsteady spatially filtered compressible Navier-Stokes equation with the SA-DDES turbulence model are solved in a fully coupled manner. A Low Diffusion E-CUSP Riemann solver is used for the inviscid flux with a 3rd order WENO reconstructed conservative variables and a 2nd order central differencing scheme for the viscous flux. The tip vortex instability generates an excitation force with the non-engine order frequency. The predicted NSV frequency shows an excellent agreement with the rig test measurement.