Experimental Study on Dynamic Characteristics of the Vehicle-end Inner Windshield in High-speed EMUs

Haiyan WANG; Guodong SUN; Peng SHE; Mingzan TANG

doi:10.13890/j.issn.1000-128x.2020.04.002

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Experimental Study on Dynamic Characteristics of the Vehicle-end Inner Windshield in High-speed EMUs

Test & Detection Technology | 更新时间：2021-12-10

- Experimental Study on Dynamic Characteristics of the Vehicle-end Inner Windshield in High-speed EMUs
- Electric Drive for Locomotives Issue 4, Pages: 8-12,22(2020)
- 作者机构：
  
  1.中车青岛四方机车车辆股份有限公司　技术中心，山东　青岛　266111
  2.中南大学　轨道交通安全教育部重点实验室，湖南　长沙　410075
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128x.2020.04.002
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Haiyan WANG, Guodong SUN, Peng SHE, et al. Experimental Study on Dynamic Characteristics of the Vehicle-end Inner Windshield in High-speed EMUs. [J]. Electric Drive for Locomotives (4):8-12,22(2020)
DOI：

Haiyan WANG, Guodong SUN, Peng SHE, et al. Experimental Study on Dynamic Characteristics of the Vehicle-end Inner Windshield in High-speed EMUs. [J]. Electric Drive for Locomotives (4):8-12,22(2020) DOI： 10.13890/j.issn.1000-128x.2020.04.002.

摘要

开展高速动车组内风挡动力学特性研究是改善车端连接系统动力学性能的重要内容。首先，介绍了高速动车组车端内风挡系统，并采用模态试验的方法获得内风挡固有振动特性。其次，基于350 km/h速度等级高速动车组进行实车线路试验，对内风挡与安装框架进行了振动测试，对比分析外风挡有无间隙条件下内风挡与车端连接系统之间的动态关系。研究表明，高速动车组内风挡结构的前8阶固有振动频率之间数值接近，使得内风挡振动的主频范围增大，易受列车运行过程中的宽频激扰引发弹性共振。当列车外风挡无间隙时，内风挡结构在风挡框架的宽频振动激励下其多阶固有频率被激励，产生接近固有频率的弹性共振；当列车外风挡之间存在间隙时，空腔内压力变化频率使得内风挡产生强迫振动。研究可为内风挡疲劳寿命以及内风挡结构动力学性能设计提供参考。

Abstract

Research on the dynamic characteristics of the vehicle-end inner windshield in high-speed EMUs is an important part of improving the dynamic performance of the vehicle-end connection system. The vehicle-end inner windshield system of high-speed EMUs was briefly introduced, and the natural vibration characteristics of the vehicle-end inner windshield was obtained through modal test. Based on the 350 km/h high-speed EMUs, the vibration test of the inner windshield and the mounting frame was carried out, and the dynamic relationship between the inner windshield and the vehicle end connection system was compared and analyzed whether or not the outer windshield had clearance. The research showed that the first eight natural vibration frequencies of the the vehicle-end inner windshield were close to each other, which made the main frequency range of the inner windshield vibration increase, and was susceptible to elastic resonance caused by broadband vibration during train operation. When there was no gap between the outer windshield, the multi-order natural frequency of the inner windshield was excited under the broadband vibration excitation of the windshield frame. When there was a gap between the outer windshield, the frequency of the pressure changed in the cavity caused the inner windshield to generate forced vibration. The study could provide reference for the design of the inner windshield fatigue life and the dynamic performance of the inner windshield structure.

关键词

高速动车组内风挡动力学特性模态试验实车试验高速列车

Keywords

high-speed EMUsthe inner windshielddynamic characteristicsmodal testfield Test

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