Influence of tunnel environment on internal acoustic comfort of the subway car
Operating environment plays an important role to the noise inside the subway car. Tunnel environment leads to the increase of noise of the subway car and the rapid decrease of sound comfort, which seriously affects the passengers' physical and mental health and missing drop-off place. At presen...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2022-03-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2022.02.002 |
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| Summary: | Operating environment plays an important role to the noise inside the subway car. Tunnel environment leads to the increase of noise of the subway car and the rapid decrease of sound comfort, which seriously affects the passengers' physical and mental health and missing drop-off place. At present, the influence of tunnel environment on noise and acoustic comfort inside the subway car is lack of relevant investigation and theoretical research. Based on this, the noise inside and outside a subway on a certain line was measured. Only the sound transmission of wheel-rail source to the subway car through air was considered. Based on the sound ray tracking method, by establishing the acoustic response model of tunnel-subway in Odeon software, the effect of tunnel with sound absorption material on noise and acoustic comfort in subway was studied furtherly. The following conclusion is drawn: in the tunnel section, the total noise inside the subway car increases by 7 dB(A), normal communication distance is reduced to 0.1-0.2 m, and sound comfort is extremely poor. The effect of laying sound absorption material on track plate is better than that of tunnel wall. When the whole tunnel is covered with sound absorbing material, the noise inside the subway car can be reduced by about 6 dB(A), normal communication distance can be increased to 0.72 m, the sound environment in the subway car has been greatly improved .The simulation results can provide certain reference for practical engineering application. |
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| ISSN: | 1000-128X |