GDS-01 ADVANCED CAE METHODS FOR AUTOMOTIVE DRIVETRAIN SYSTEM GEAR WHINE OPTIMIZATION(DESIGN AND SYNTHESIS OF A PAIR OF GEARS OR OF GEAR TRAINS)

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This paper describes a new and efficient analytical methodology that is now used at Ford Motor Co. to evaluate any potential gear whine failure modes upfront in the design process for transmissions and axles. This method effectively combines analytical formulations for non-linear contact and finite element analysis to provide accurate and fast design analysis with drastic reduction in modeling and solution time compared to other conventional analytical methods. The paper presents how gear micro-geometry is integrated as part of the drivetrain system (transmission + driveshaft + axle) and analyzed as a fully coupled system to properly compute gear multi-mesh transmission error and the system dynamic response. A modeling method for a fully assembled multi-speed planetary transmission with rear axle and all internal components represented as flexible bodies is introduced. Gear transmission error was applied to induce gear dynamic force and transmission case vibration. Furthermore, CAE predictions are compared to experimental data to validate the simulation. Finally, planetary gear upfront design options are evaluated and optimized using design of experiments method.
一般社団法人日本機械学会の論文
2009-05-13