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敞车与其它型式的车辆不同,在车体侧墙上边梁平面内缺少横向联系,而靠开敞的开口框架去抑制上边梁避免相对于侧墙平面的弯曲。每个开口框架由横向梁和固定在上面的两个立柱组成。上边梁和开口框架组成了弹性系统:横向刚架越弱则上边梁应当越强;反之亦然。开口框架应该建立可能的刚度,以减少立柱上端的位移,这个位移与横向梁的弯曲和立柱自身的弯曲有关。敞车的许多试验表明:车体上部由于运
Gondola is different from other types of vehicles in the body side wall side beams in the horizontal plane lack of contact, but by the open open frame to inhibit the roof beam to avoid bending relative to the plane of the side wall. Each opening frame consists of a transverse beam and two uprights fixed to it. The roof and the open frame form a flexible system: the weaker the transverse frame, the stronger the roof beam and vice versa. The opening frame should establish the possible stiffness to reduce the displacement of the upper end of the column, which is related to the bending of the transverse beam and the bending of the column itself. Many tests of gondola show that the upper part of the car body is transported as a result