Abstract: Herein,we addressed the rotational vibration modes of super-gravity vacuum evaporator,the key equipment for advanced water-desalination plant.The influence of the realistic situations,including the pre-stress,load of sea-water,rotation speed,and mechanical properties of evaporator material,on the vibration behavior was empirically approximated,mathematically modeled,numerically simulated with ANSYS software and experimentally evaluated with the lab-built test platform for design optimization.The simulated results show that the rotation-speed and pre-stress have a major impact.To be specific,a rotation-speed approaching 360 r/min,for example,359.37 r/min,may excite a resonance.The intrinsic vibration modes of the rotation chambers,made of plastics,stainless-steel and Al-alloy,were calculated.The simulated and measured results were found to be in good agreement.We suggest that Al-alloy may be an optimized evaporator material.