It is difficult to make an evaluation with only a single analytical technology to improve the reliability and performance of fluid machinery, and the application of multiphysics analysis that takes into account the interaction between fluid force and structure is required. Mitsubishi Heavy Industries, Ltd. has developed technology for the reduction of shaft vibration and noise of a turbocharger and the improvement of the efficiency and reliability of a swash plate type hydraulic piston pump by using lubrication-mechanism-structure coupled analysis. The technology introduced here is targeted at fluid machinery for which the lubrication state shows a time history change (self-excited vibration of bearings of a turbocharger and position/attitude change caused by reciprocating motion of swash plate type hydraulic piston pump). This technology enables the analysis of state changes at any given moment by coupling lubrication, mechanism and structure analysis. Furthermore, combining this analysis technology with optimization calculation facilitates the optimum design.
