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- W2369566438 abstract "Based on the theory of computational fluid dynamics, the aerodynamic forces of high-speed train on simply supported box-girder bridge installed with wind barriers of various height were computed by numerical simulation. The rolling moment to the geometric center of train, windward axis of wheel-rail contact and leeward axis of wheel-rail contact were analyzed. The concepts of control rolling moment and summed control rolling moment were proposed, and the optimal height of wind barriers was found according to the concepts through approximation method. The mechanism of the improvement of wind barriers to aerodynamic performance of train was studied. The results show that the height of wind barriers has significant effect on the aerodynamic forces of train, and the optimal height is different according to different components. The rolling moment to wheel-rail contact axis is larger than that to geometric center, and is more sensitive to wind barriers height. The control rolling moment is to leeward axis of wheel-rail contact when the wind barriers is low, and it will transfer to windward axis of wheel-rail contact when the height of wind barriers increases to some value, and furthermore, the optimal height of wind barriers isn't the height that caused the rolling moment to windward or leeward axis of wheel-rail contact to 0 N·m for double lines bridge. In consideration of aerodynamic forces of train on both lines, the optimal height of wind barriers of aerodynamic scale model is 95 mm according to summed control rolling moment. It is known that the optimal height of wind barriers is 1.9 m on high-speed railway of simply supported box-girder bridge with double lines." @default.
- W2369566438 created "2016-06-24" @default.
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- W2369566438 date "2014-01-01" @default.
- W2369566438 modified "2023-09-23" @default.
- W2369566438 title "Numerical study on optimal height of wind barriers and mechanism on high-speed railway bridge with double lines" @default.
- W2369566438 hasPublicationYear "2014" @default.
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