2012 11 31 11 Mechanical Science and Technology for Aerospace Engineering November Vol. 31 2012 No. 11 400065 3 U231 A 1003-8728 2012 11-1760-07 Research Progress on Vibration Isolation of Floating Slab Track Structure of Subway Li Rui Chen Kelong Feng Huizong He Limin College of Automation Chongqing University of Posts and Telecommunications Chongqing 400065 Abstract The excitation induced by the interactions of wheels and subway tracks was discussed. Also its models and applied methods were depicted. After the introducing of the principle of isolation for floating slab track FST and displaying of the structures of FST supported with elastomer and spring the models of FST including lumped parameter model continuous model and discrete model were demonstrated. Then the dynamic performance modal analysis and effectiveness of isolation for FST were showed. In order to solve the main isolation problems of FST the parameter optimization for stiffness and damping constant as well as the semi-active vibration isolation technology or active vibration isolation technology were considered to be the development trend. Key words subway track mount dynamics analysis vibration isolation 1 2 3 4 4 1 2011 08 05 51005264 CSTC2012jjA40035 1975 - lirui - cqu@ 163. com
11 1761 1. 1 5 6 7 1. 2 Jun Yuan 8 M. F. M Huseein 9 2 F x t = e iωt δ x - vt 1 δ F e ω x v t 10 3 0. 5 ~ 10 Hz 30 ~ 60 Hz 100 ~ 400 Hz 3 F t = P 0 + P 1 sin ω 1 t + P 2 sin ω 2 t + P 3 sin ω 3 t 1965 2 40 F P 0 P 1 P 2 P 3 3 ω 1 ω 2 ω 3 1. 3 11 2. 1 9 12 ~ 14 1. 4 1
1762 31 1 1 16 Hz 12 Hz 20 db ~ 30 db 25 db ~ 40 db 15 3 16 Hz 20 db ~ 30 db 16 1 2 3 20 Hz 2. 2 2 10 Hz 25 db ~ 40 db 3 3 M 1 M 2 K 1 C 1 K 2 C 2 2 8 Euler-Bernoulli K 1 K 2 C 2 4 15 16 1 30 2 3 2. 3 4 1 C 1
11 1763 4 K 1 C 1 5 3 4. 1 5 17 20 21 22 18 19 17 5 m 2 2 4. 2 槡 k / 4π 2 M 18 槡 2 23 24
1764 31 3 / kg m - 1 750 ~ 4 000 23 50 m 1 ~ 8 /m 1 ~ 7 15 /m 2. 4 ~ 3. 2 6 7 /m 0. 3 25 6 / MN m - 1 10 ~ 50 / MN m - 1 5 ~ 30 / N s m - 1 5 10 4 ~ 2 10 5 4. 3. 2 4. 3 17 5 m 62. 8% Z 10 db 33 20 m 4. 3. 1 M. F. M. Hussein 18 26 27 34 26 Chen-Ming Kuo 28 80% 35 4. 3. 3 槡 2 29 30 31 4 36 ANSYS 32 T De-yun DING 11 7 Hz 9 Hz 25 db 9 Hz 3
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