CAJ | 학술논문

基于线路试验，测试分析了100％低地板列车车内噪声特性，研究了车内噪声源分布以及空气传声、结构传声路径对车内噪声的贡献。使用统计能量法建立了单节车车内噪声预测模型，并利用其获得了车内噪声的功率输入贡献率，在此基础上提出了车内减振降噪建议措施。试验和仿真结果表明，虽然低地板列车的转向架位于车厢中部，但是车内噪声仍然表现为两端大、中间小的趋势。车内噪声显著频段为中心频率250～2000 Hz的1／3倍频带，主要噪声源位于地板和风挡区域，主要是轮轨区域噪声。客室两端噪声主要经由车下地板和风挡结构传递至车内，客室中部噪声主要经由车下地板结构传递至车内，噪声传递路径为空气传声。因此，提高地板、风挡的密封和隔声性能是降低车内噪声的有效方法。相关研究结果可为100％低地板列车车内减振降噪提供参考。
기우선로시험，측시분석료100％저지판열차차내조성특성，연구료차내조성원분포이급공기전성、결구전성로경대차내조성적공헌。사용통계능량법건립료단절차차내조성예측모형，병이용기획득료차내조성적공솔수입공헌솔，재차기출상제출료차내감진강조건의조시。시험화방진결과표명，수연저지판열차적전향가위우차상중부，단시차내조성잉연표현위량단대、중간소적추세。차내조성현저빈단위중심빈솔250～2000 Hz적1／3배빈대，주요조성원위우지판화풍당구역，주요시륜궤구역조성。객실량단조성주요경유차하지판화풍당결구전체지차내，객실중부조성주요경유차하지판결구전체지차내，조성전체로경위공기전성。인차，제고지판、풍당적밀봉화격성성능시강저차내조성적유효방법。상관연구결과가위100％저지판열차차내감진강조제공삼고。
Based on field measurements ,the characteristics and distribution of the interior noise of the 100% low‐floor train are analyzed in detail .The interior noise sources and the contributions of the air‐borne and the structural‐borne sound are identi‐fied .The interior noise prediction model of the single vehicle is built based on the SEA (statistic energy analysis) method to get the contribution rate of noise power input .Furthermore ,counter measures are proposed for control of the interior noise .The results show that although the vehicle bogie located in the middle of the 100% low‐floor coach ,the interior noise is higher at the both ends of the coach and lower in the middle .The 1/3 octave bands with high noise level are in the range of 250~2 000 Hz with center frequencies .And the main source of the vehicle is wheel‐rail noise which is identified in the areas of the floor and the vestibule diaphragm .The interior noise at the ends of the coach is from under the coach and transmitted through the vestibule diaphragm and while it in the middle almost comes via the floor .Because the air‐borne sound is the most important transfer path ,to improve the seal and the sound transmission loss of the floor and the vestibule diaphragm is an effective way to reduce the interior noise .The obtained results provide a useful solid basis for further finding interior noise control measures of the 100% low‐floor railway train .