http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zegen Wang (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Suppression of abnormal chattering of a high-speed EMU carbody
Dao Gong,Zegen Wang,Jinsong Zhou,Jianyue Zhu 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.4
A carbody chattering phenomenon accompanied by bogie hunting movement was investigated. The online test results showed that the vehicle at a large tread conicity state exhibited insufficient stability when running at higher speeds, causing the hunting frequency of the bogie to continuously increase, approach the diamond-shaped deformation modal frequency of the carbody, consequently causing the carbody to chatter. To improve the running stability of the vehicle, to suppress the carbody chattering, a two-step progressive optimisation method that combined analytical optimisation, simulation optimisation to optimise the parameters of the anti-yaw damper was proposed. Furthermore, the effect of optimisation was experimentally verified. Results showed that after optimisation, the critical speed of the vehicle under the condition of worn wheel was significantly enlarged, the bogie exhibited no obvious hunting motion, carbody chatter was significantly alleviated, both the ride quality, the curve passing performance were improved.
-
A modal frequency optimization approach for a fully-equipped car body of high-speed trains
Dao Gong,Zegen Wang,Guangyu Liu,Jinsong Zhou 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.1
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.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
