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对地铁车辆在静止及运行情况下进行车内噪声测试。测点布置在车体中央、风挡及转向架上方距地板面不同高度处。在静止情况下,空调送风口处噪声值为77.8 dB(A)。车辆运行分为隧道内和高架上两种情况,隧道内运行时,车内相应点处的噪声值比高架上高1.0-5.9 dB(A)。车辆在运行过程中对车内噪声影响较大的是轮轨噪声,车辆附属设备影响较小。车辆的密封性对车内噪声的分布有较大的影响,应提高车门、风挡的密封性。
On the subway vehicles in the stationary and operating conditions of the car noise test. Measuring points arranged in the central body, windshield and bogie above the floor from different heights. At rest, the noise level at the air-conditioned outlets is 77.8 dB (A). Vehicle operation is divided into tunnel and elevated two cases, the operation of the tunnel, the car at the corresponding point of the noise value higher than the elevated 1.0-5.9 dB (A). Vehicle noise during the operation of the greater impact on the wheel and rail noise, vehicle accessory equipment less affected. The sealing of the vehicle has a greater impact on the distribution of noise inside the car, should improve the sealing of the doors, windshield.