This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Transmission Side Cover Design Optimization for NVH Part 2: Geometric Optimization Studies
Annotation ability available
Sector:
Language:
English
Abstract
The design of Front Wheel Drive transmission side covers is primarily driven by packaging concerns, and secondarily by structural durability requirements. While the side cover design is a very important element in the NVH performance of a transaxle, there has historically been little consideration of this concern at the design stage.
The typical approach to NVH considerations on a side cover is to start with the initial prototype hardware and add any stiffening features in order to reduce the cover vibration or radiated sound. A preferred approach would be to factor the NVH considerations into the initial design. Through consideration of the packaging constraints and a goal of maximizing the fundamental natural frequency of the side cover, it is possible to select from various alternative geometries the one which best meets these objectives. Present day geometry optimization algorithms available in high-end Computer Aided Design packages provide an automated process of achieving this goal.
Part 1 of this paper presented the first phase in addressing this design goal through a consideration of the relative benefits of introducing shell curvature to a flat plate geometry. This part presents the extension to the three dimensional geometric consideration with consideration of package constraints. The results show the benefits and practicality of using geometric optimization in determination of an improved side cover design from an NVH perspective.
Recommended Content
Authors
Citation
Chung, C., Steyer, G., and Brassow, B., "Transmission Side Cover Design Optimization for NVH Part 2: Geometric Optimization Studies," SAE Technical Paper 972025, 1997, https://doi.org/10.4271/972025.Also In
References
- BENNETT, J.A. Botkin, M.E. “Structural Shape Optimization with Geometric Description and Adaptive Mesh Refinement,” AIAA Journal 23 3 1985 458 464
- Reklaitis, G.V Ravindran Ragsdell, K.M. “Engineering Optimization Methods and Applications,” John Wiley 1983
- Vanderplaats, G. N. “Numerical Optimization Techniques for Engineering Design: With Applications,” McGraw-Hill 1984
- “I-DEAS Model Solution and Optimization User's Guide for Master Series 3,” Structural Dynamics Research Corporation 1996