Contact analysis and optimization design of blade and disc assembly based on mesh deformation

A study was conducted to perform contact analysis and optimization design of blade and disc assembly based on mesh deformation. The contact analysis was performed by using software of hypemesh, while accurate analysis of aeroengine turbine blade and disc joining structure was carried out using software of MSC.Marc. The optimization of contact stress was implemented by adjusting fit clearance of mortise and tenon. The geometry model of the turbine blade and disc was built using CAD software of UG. It was found that there were 41 mortises, which uniformly distributed along circumference in the turbine disc. It was also observed that only 1/41 of disc was employed to simplify the calculation and improve the accuracy of contact analysis. Calculations and analyses revealed that the blade and disc were under centrifugal loading with a rotation of 27000 r/minute.