Optimum Design of a Gearbox for Low Vibration
| Autor: | Dennis P. Townsend, Katsumi Inoue, John J. Coy |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Engineering
Source code Computer program business.industry Mechanical Engineering media_common.quotation_subject Modal analysis Shell element Structural engineering Computer Graphics and Computer-Aided Design Finite element method Computer Science Applications Vibration Mechanics of Materials Minification business Eigenvalues and eigenvectors media_common |
| Zdroj: | 6th International Power Transmission and Gearing Conference: Advancing Power Transmission Into the 21st Century. |
| DOI: | 10.1115/detc1992-0064 |
| Popis: | A computer program was developed for designing a low vibration gearbox. The code is based on a finite element shell analysis method, a modal analysis method, and a structural optimization method. In the finite element analysis, a triangular shell element with 18 degrees-of-freedom is used. In the optimization method, the overall vibration energy of the gearbox is used as the objective function and is minimized at the exciting frequency by varying the finite element thickness. Modal analysis is used to derive the sensitivity of the vibration energy with respect to the design variable. The sensitivity is representative of both eigenvalues and eigenvectors. The optimum value is computed by the gradient projection method and a unidimensional search procedure under the constraint condition of constant weight. The computer code is applied to a design problem derived from an experimental gearbox in use at the NASA Lewis Research Center. The top plate and two side plates of the gearbox are redesigned and the contribution of each surface to the total vibration is determined. Results show that optimization of the top plate alone is effective in reducing total gearbox vibration. |
| Databáze: | OpenAIRE |
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