Abstract: A double-deck rail vehicle and a vehicle body thereof are provided. An underframe (11) of the vehicle body comprises a lower-layer underframe (111), end underframes (112, 115), sealing plates (114, 116), and side underframes (118, 119); wherein the lower-layer underframe is provided with an underframe middle beam (1111); the end underframe is fixedly connected to the underframe middle beam by means of reinforcement middle beams (113, 117); the sealing plate is fixedly connected between the end underframe and the lower-layer underframe; and the side underframe comprises side beams (1181, 1191) of the side underframe that are integrated, and the side underframe is fixedly connected to the end underframe by means of the side beams of the side underframe. The vehicle body supplements the reinforcement middle beams capable of increasing the connection strength between the end underframe and the lower-layer underframe, and uses the integrated side beams of the side underframe.

Abstract: Provided is a side wall window structure module of a train, the side wall window structure module comprising a window wallboard (100), supporting members shaped like the Chinese character “” and reinforcing members shaped like the Chinese character “”, and stand columns (210) and supporting cross beams (311, 312, 313, 314) using the supporting members shaped like the Chinese character “”, wherein two flanging edges of each supporting member shaped like the Chinese character “” are fixed on the inner side, facing the interior of the train, of the window wallboard (100); each reinforcing member shaped like the Chinese character “” comprises a longitudinal reinforcing member (220) and a transverse reinforcing member (320); two flanging edges of each reinforcing member shaped like the Chinese character “” are fixed to one side edge of each supporting member shaped like the Chinese character “”; and an arched high edge of each reinforcing member shaped like the Chinese character “” is fixed to the other side edge

Abstract: A double-deck rail vehicle and a vehicle body thereof are provided. An underframe (11) of the vehicle body comprises a lower-layer underframe (111), end underframes (112, 115), sealing plates (114, 116), and side underframes (118, 119); wherein the lower-layer underframe is provided with an underframe middle beam (1111); the end underframe is fixedly connected to the underframe middle beam by means of reinforcement middle beams (113, 117); the sealing plate is fixedly connected between the end underframe and the lower-layer underframe; and the side underframe comprises side beams (1181, 1191) of the side underframe that are integrated, and the side underframe is fixedly connected to the end underframe by means of the side beams of the side underframe. The vehicle body supplements the reinforcement middle beams capable of increasing the connection strength between the end underframe and the lower-layer underframe, and uses the integrated side beams of the side underframe.