A fully coupled fluid-structure interaction tool will find a large number of applications in the SLS propulsion system including: 1. Modeling of liquid damping devices such as LOX damper performance; 2. Liquid propellant tank breathing due to liquid interaction with the flexible tank shell; 3. Fluid-structure interaction in nuclear thermal rockets; 4. Modeling of water troughs during water suppression system interactions with Ignition Over Pressure (IOP) for accurate prediction of acoustic launch environment of SLS; 5. Prediction of self-generated dynamics of fluid delivery pipes with deformable bellows; 6. Modeling of fluid-thermal-structural coupling of rocket engine nozzles; 7. Investigation of fluid-induced vibration of J-2X turbine and inducer blades; and 8. Design of new generation POGO accumulators with bellows separating liquid and gas phases The developed FSI analysis tool will provide accurate high-fidelity aeroelastic/hydroelastic analyses for dynamic loads analysis of turbomachinery, inducer, delivery pipe, and valves. Aerospace engineers will be able to utilize the proposed technology to analyze early designs of turbomachinery, thereby reducing the dependence on expensive wind tunnel/water tunnel and flight tests. Benefits will also be achieved in the final performance, and enhanced structural integrity, prolonged structural life, and improved safety of aerospace vehicles. Direct applications of the technology are in the analysis of dynamic loads problems of aerospace vehicles, such as buffet, flutter, buzz, and control reversal. Direct applications of the technology are also in noise, vibrations, and buffet suppression of rotorcraft and commercial air vehicles. General applications of the technology include fluid-structure interaction problems such as vortex-blade interaction of rotorcraft, trailing vortex dynamics of commercial aircraft, heat exchanger vibration, strumming of cables and offshore pipelines, galloping of towers and masts, and fatigue of panels.