Correlation of Test with CAE of Dynamic Strains on Transmission Housing for 4WD Automotive Powertrain Mahindra and Mahindra Limited

Format:

Conference/Event

Author/Creator:

Yadav, Yadav, author.

Contributor:

Khandait, Santosh Mahadeorao

Londhe, Abhijit Vishnu

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

Reducing the vibrations in the powertrain is one of the prime necessities in today's automobiles from NVH and strength perspectives. The necessity of 44 powertrain is increasing for better control on normal road and off-road vehicles. This leads to bulky powertrains. The vehicle speeds are increasing, that requires engines to run at higher speeds. Also to save on material costs and improve on fuel economy there is a need for optimizing the mass of the engine/vehicle. The reduced stiffness and higher speeds lead to increased noise and vibrations. One more challenge a powertrain design engineer has to face during design of its transmission housings is the bending / torsional mode vibrations of powertrain assembly. This aggravates other concerns such as shift lever vibrations, shift lever rattle, rise in in-cab noise, generation of boom noise at certain speeds, et ceteraHence, reducing vibrations becomes an important and difficult aspect in design of an automobile. Most of the solutions are directed at shifting the vibration frequencies out of normal engine operation range. This is accomplished by increasing the stiffness or by addition of external stiffeners bolted on the structure. The 44 powertrain modal frequencies generally fall within the operating range of excitation frequencies and may get excited during normal engine operation.To validate powertrains in early stage of design CAE plays a vital role. Correlation is necessary to validate the CAE method and apply it confidently for design iterations and improve the designs through optimization techniques, so that these virtual iterations will work in the field as well.Paper discusses on the correlation of frequencies of 44 powertrain and correlation for the dynamic strains measured on the high speed test track with CAE

Notes:

Vendor supplied data

Publisher Number:

2010-01-0497

Access Restriction:

Restricted for use by site license