| Autor: |
Gong, Dao, Wang, Zegen, Liu, Guangyu, Zhou, Jinsong |
| Předmět: |
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| Zdroj: |
Journal of Mechanical Science & Technology; Jan2020, Vol. 34 Issue 1, p11-21, 11p |
| Abstrakt: |
The tubular structural car body of high-speed trains with lightweight design generally results in a low diamond deformation modal frequency, which deteriorates significantly both the lateral and vertical vibrations of the car body. To increase the diamond deformation modal frequency of the car body, the structural optimization and modal sensitivity optimization of the car body based on sensitivity analysis are proposed. The former starts with the analysis of the mode shape deformation characteristics; in the latter case, the modal strain energy verification is considered and the influence of the threshold values of sensitivity on the modal frequency optimization are studied. Results show that by increasing the spacing of the inner and outer panels of the side wall from 47 mm to 65 mm and optimizing the thicknesses of 16 components of the car body, the diamond deformation modal frequency of the fully-equipped car body can be enhanced from 8.7 Hz to 10.31 Hz, while ensuring the lightweight requirement without loss in car body strength. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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