Influence of Vehicle Body Deformation on Vehicle Interior Pressure under Tunnel Pressure Based on Fluid-solid Coupling

Yongping FENG; Chunjun CHEN; Rentao CHEN

doi:10.13890/j.issn.1000-128x.2021.03.106

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Influence of Vehicle Body Deformation on Vehicle Interior Pressure under Tunnel Pressure Based on Fluid-solid Coupling

Railway Rolling Stock | 更新时间：2021-12-09

- Influence of Vehicle Body Deformation on Vehicle Interior Pressure under Tunnel Pressure Based on Fluid-solid Coupling
- Electric Drive for Locomotives Issue 3, Pages: 80-85(2021)
- 作者机构：
  
  1.西南交通大学　机械工程学院，四川　成都　610031
  2.轨道交通运维技术与装备四川省重点实验室，四川　成都　610031
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128x.2021.03.106
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Yongping FENG, Chunjun CHEN, Rentao CHEN. Influence of Vehicle Body Deformation on Vehicle Interior Pressure under Tunnel Pressure Based on Fluid-solid Coupling. [J]. Electric Drive for Locomotives (3):80-85(2021)
DOI：

Yongping FENG, Chunjun CHEN, Rentao CHEN. Influence of Vehicle Body Deformation on Vehicle Interior Pressure under Tunnel Pressure Based on Fluid-solid Coupling. [J]. Electric Drive for Locomotives (3):80-85(2021) DOI： 10.13890/j.issn.1000-128x.2021.03.106.

摘要

当高速列车通过隧道时，隧道压力波通过车体变形、密封缝隙和换气风道引起车内压力变化，造成乘客不适。为探明由车体结构变形这单一因素引起的车内压力波动情况，构建了完全密封的车体结构和车厢结构模型，基于STAR-CCM+/Co-Simulations模块，仿真计算了高速列车以350 km/h的速度通过隧道时车体结构的振动位移情况、车内压力变化和车内压力变化率，并与气体状态方程理论数值模拟计算对比。结果表明，车门的振动位移最大；基于流固耦合理论和理想气体状态方程的2种数值模拟方法的结果误差为16.8%，相互验证了计算结果的可靠性；车内压力与车体内的容积成反比，车内最大负压为195.3 Pa，车内压力3 s变化率小于203.1 Pa/(3 s)，车内压力1 s变化率小于149.6 Pa/s，满足舒适性要求，为建立多因素耦合作用下的车体模型研究提供帮助。

Abstract

When the high-speed train passes through a tunnel, the tunnel pressure wave will induce the pressure variation inside coach by causing the shape deformation of the train and the air exchange via sealing gaps and the ventilation ducts, and result in the discomfort to the passengers. In order to investigate the pressure fl uctuation caused by the deformation of vehicle body structure, the completely sealed model of vehicle body and carriage structure was built. Based on the STAR-CCM+/Co-Simulations module, the vibration displacement, the amplitude and the change rates of pressure inside coach of high-speed train passing through the tunnel at 350 km/h were calculated by simulation and compared with the theoretical numerical simulation of gas state equation. The results showed that: The largest vibration displacement occurred in the door; The error of the 2 numerical simulation methods based on the fl uid-solid coupling model and the ideal gas state equation was 16.8%, which veri fi ed the reliability of the calculated results; The pressure inside coach was inversely proportional to the coach volume; The maximum negative pressure inside coach was less than 195.3 Pa, and the 3-second change rate of interior pressure was less than 203.1 Pa /(3 s), while the 1-second change rate of interior pressure was less than 149.6 Pa /s, which met the comfort requirements. It could also be helpful to establish the mathematical model of vehicle body under the interaction of multi-factor coupling.

关键词

高速列车动车组车体变形隧道压力波车内压力波仿真

Keywords

high-speed trainEMUthe shape deformation of the traintunnel pressure wavepressure fluctuation inside coachsimulation

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