† 교신저자, 서울특별시도시철고공사, 철도전문대학원 E-mail : exact [email protected]
* 한국철도기술연구원
도시철도 전동차 주행성능 향상을 위한 횡댐퍼에 관한 연구
A Study on Lateral Damper for Improving Running Performance of
Subway Vehicle
전주연 허현무* 신유정* 유원희* 구정서**
Ju-yun Jeon Hyun-moo Hur Yu-jeong Shin Won-hee You Jeong-seo Koo
ABSTRACT
As a secondary suspension, the air spring has not good lateral stiffness characteristics. In order to make up for this weak point, lateral damper is used between bogie and carbody. The lateral vibration of carbody can be reduced by the lateral damper.
When the damping force of lateral damper becomes worse, the running stability and ride comfort of the railway vehicle go down. Simultaneously the lateral motion of carbody is increased.
In this study, the lateral displacement of carbody was studied by the multibody dynamic analysis in accordance with lateral damping force to find the cause of abnormal noise(impact noise) when the vehicle is running. The suitable lateral damping force was reviewed in order not to generate abnormal noise.
0 20 40 60 80 100 120 0 Velocity(km/h) 0 20 40 60 80 100 120 0 Velocity(km/h) 1857
10-1 100 101 -240 Frequency (Hz) 10-1 100 101 -240 -220 -200 -180 -160 -140 -120 M ag ni tu de (d B )
carbody lateral motion(disp.) by wheelset externalF, Velocity : 70
Frequency (Hz) V=30m/s Csy=0.006e6 V=30m/s Csy=0.06e6 V=50m/s Csy=0.006e6 V=50m/s Csy=0.06e6 V=70m/s Csy=0.006e6 V=70m/s Csy=0.06e6 1859
0 0.01 0.02 0.03 0.04 0.05 0.06 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Velocity(m/s) Lo ad (N ) Extension Compression Criteria 0 0.01 0.02 0.03 0.04 0.05 0.06 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Velocity(m/s) Lo ad (N ) Extension Compression Criteria
6. 박준서, 김정태, “표준전동차 차내 소음특서에 예측평가기법 연구,” 한국철도학회, 철도저널, 제4권 제 2호(통권 제11호), pp.82-88, 2001.
