FOREFRONT PART STRUCTURE OF MOVABLE BODY - RAILWAY TECHNICAL RES INST

Title:

FOREFRONT PART STRUCTURE OF MOVABLE BODY

Document Type and Number:

Japanese Patent JP2021142944

Kind Code:

A

Abstract:

To provide a forefront part structure of a movable body capable of exhibiting a reduction effect of a micro atmospheric pressure wave even if there is a step part in a forefront part of the movable body.SOLUTION: A forefront part structure 7 has a structure having micro atmospheric pressure wave reduction performance which can reduce a micro atmospheric pressure wave that is generated when a vehicle 2 having a step part 5C in a forefront part 5A plunges into a tunnel. A forefront part shape S has at least three peaks P1 to P3 in a cross sectional area rate-of-change distribution dA*/dX of the forefront part 5A of the vehicle 2, and the step part 5C is present in the peaks P1 to P3. The forefront part shape S has the peaks P1 to P3 of the cross sectional area rate-of-change distribution dA*/dX at a forefront part tip 5a, a forefront part intermediate part 5b and a forefront part rear end 5c of the forefront part 5A of the vehicle 2, and the step part 5C is present between the peak P1 of the forefront part tip 5a and the peak P2 of the forefront part intermediate part 5b. The step part 5C is formed in the forefront part 5A when the forefront part 5A is drawn.SELECTED DRAWING: Figure 5

More Like This: