Strength analysis of hydraulic retarder rotator blades based on CFD and FEA

Based on CFD numeric simulation for hydraulic retarder inner flow field, the pressure distribution functions of the rotator blades surfaces are regressed by coordinate transformation and surface fitting. Through the APDL program, pressure loads are loaded on the FEA model according to the regressed pressure functions, which vary with the x-and y-coordinates in local coordinates. The FEA model is solved and the blades strength is analyzed more accurately. The results showed that the stress on the root of the rotator blades is much higher than the critical stress intensity of the material under the condition of maximum rotating speed.