域D型车辆是专为市域(郊)铁路自主研制的一款新型宽体客运车辆，车宽3 300 mm、25 kV供电，融高速动车组技术优势和城轨车辆运营特点于一体。针对市域铁路运营对车辆的要求，通过系统分析和优化设计，解决了大载客量与宽车体轻量化、快速运行与频繁起停、噪声控制等技术难题，创新研制了市域D型车辆；进而论述了温州S1线D型车辆的平面布置、编组形式、主要技术参数、主要系统技术方案。型式试验和运营统计表明，温州S1线市域D型车辆性能稳定、安全可靠，从而印证了市域D型车辆相关标准的适用性、先进性。 关键词: 市域铁路；D型车辆；研制；标准；适用性；先进性
The Style D suburban railway vehicle is independently developed for suburban railways, and it is a new style of wide-body passenger vehicle with a width of 3, 300 mm and a power supply of 25 kV. It has the technical advantages of high-speed EMUs and the operating characteristics of an urban railway vehicle. In this study, in accordance with the requirements of suburban railway operation for vehicles, a system analysis was conducted and an optimization design was developed involving a large passenger capacity, lightweight and wide-body design, fast operation, frequent starts and stops, and noise control to solve technical problems. Furthermore, the plane layout, marshalling form, main technical parameters, and main system technical solutions of a Wenzhou S1 line Style D vehicle have been discussed. Type tests and operational statistics show that the Style D vehicle performance of the Wenzhou S1 line is stable, safe, and reliable, which proves the applicability and advancement of the relevant standards of a Style D suburban railway vehicle.