虚拟轨道列车轮区隔声方案设计及效果评估
齐玉文1吴健1徐佳明2赵海波1陈俊霖3
Sound Insulation Scheme Design and Effect Evaluation of Virtual Rail Train Wheel Area
QI YuwenWU JianXU JiamingZHAO HaiboCHEN Junlin
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作者信息:1.1.中车长春轨道客车股份有限公司国家轨道客车工程研究中心， 130062， 长春；
2.2.中车长春轨道客车股份有限公司转向架制造中心, 130062, 长春;
3.3.西南交通大学牵引动力国家重点实验室， 610031， 成都
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Affiliation:National Engineering Research Center of Railway Vehicle, CRRC Changchun Railway Vehicles Co., Ltd., 130062, Changchun, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.04.021
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中图分类号/CLCN:U270.1+1
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栏目/Col:应用技术
摘要:
为了降低虚拟轨道列车的车内噪声，提高乘坐的舒适性，设计了列车轮区组合隔声方案，并结合试验与仿真的结果研究其降噪效果。针对虚拟轨道列车轮区噪声源分布特点，将轮区划分为若干区域，综合考虑各区域的空间布置限制、结构隔声性能和轻量化，设计了不同区域下的组合隔声方案。利用混响室－混响室方法对设计的隔声样件进行隔声特性测试。基于统计能量法，建立了列车车内噪声预测模型，并结合实际线路上的运行工况和测试结果，预测了采用轮区隔声方案的车内噪声值，最后根据设定的噪声目标限值对隔声方案的降噪效果进行评估。计算结果表明：轮区板件采用设计的组合隔声方案时，车内最大噪声声压级为1车客室后的675 dB(A)，最小噪声声压级为后风挡处的651 dB(A)。列车车内各位置的噪声声压级均小于设计的目标限值(690 dB(A))，满足设计要求。
Abstracts:
To reduce virtual rail train interior noise and improve ride comfort, a train wheel area composite sound insulation scheme is designed, and the noise reduction effect is studied based on the results of experiments and simulations. According to the characteristics of noise source distribution in virtual rail train wheel area, the wheel area is divided into several regions, and the composite sound insulation schemes in different regions are designed considering the spatial arrangement restrictions, structural sound insulation performance and light weight accordingly. Reverberation chamber-reverberation chamber method is used to carry out sound insulation characteristic test of sound insulation samples. Based on statistical energy method, the train interior noise prediction model is established. With the operation working conditions and test results on actual lines, the interior noise value after adopting wheel area sound insulation scheme is predicted, and the noise reduction effect of the scheme is evaluated according to the regulated noise target limit. Calculation results show that when the wheel area plates adopt the designed composite sound insulation scheme, the maximum interior noise SPL (sound pressure level) is 67.5 dB (A) in the first compartment rear section and the minimum noise SPL is 65.1 dB (A) at the rear windshield. The noise SPL at each position in the train is less than the design target limit (69.0 dB (A)), meeting the design requirements.
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