Optimal Design for the Nose Shape of Commercial High-speed Train Using Function of Train Configuration
열차형상함수를 이용한 상용 고속열차 전두부 형상 최적설계

Minho Kwak, Suhwan Yun, Choonsoo Park
2015 Journal of the Korean society for railway  
Using the Vehicle Modeling Function, which can model various 3D nose shapes, nose shape optimization is performed to reduce the aerodynamic drag of the KTX Sancheon. 2D characteristic shapes of the KTX Sancheon nose were extracted and a base model of the KTX Sancheon was constructed for design optimization using the Vehicle Modeling Function. The design space was constructed with the base model and does not violate the shape constraints of commercial trains. Through nose shape optimization with
more » ... the Broyden-Fletcher-Goldfarb-Shanno algorithm, the aerodynamic drag of the optimized shape was reduced by 6% compared to that of the base model. The longer nose and sharper edge of the optimized shape weaken the vortices behind the last car and can reduce the aerodynamic drag.
doi:10.7782/jksr.2015.18.4.279 fatcat:57ubxkvikbarrbo6ytbasdsaqi