Patent ID: 8939089
Filing Date: 2015-01-27
Classification: B61D

Abstract:
1. An autorack railroad car for rolling motion in a longitudinal direction along railroad tracks, said autorack railroad car comprising: a main deck; a first elevated deck spaced upwardly from said main deck; a housing enclosing said main deck and said first elevated deck; said housing including a roof spaced upwardly of said first elevated deck; said housing having an access-way at a first end thereof through which to conduct wheeled vehicles onto said main deck and said first elevated deck; a door movable to govern access to said housing; said door being a folding door hingedly mounted to said housing, said door having at least a first panel and a second panel hingedly connected together; said door having an upstanding first margin and an upstanding second edge margin; when said door is in a closed position said upstanding second edge margin being laterally inboard of said upstanding first margin; at least a first of said first and second panels of said door having a first vibration nodal point adjacent said main deck, and a second vibration nodal point distant from said main deck; a dynamic response member positioned height-wise intermediate said first nodal point and said second nodal point, and laterally inboard of said upstanding first margin; and in said closed position of said door said dynamic response member impedes primary mode vibration of said door in the longitudinal direction.