二、提高隔振性能降低噪声轮轨冲击产生的噪声通过轮对、车轴、轴承、构架、心盘而进入车内。在上述刚性支承处垫入弹性垫,避免金属与金属间的直接接触,就可隔绝固体声的传递途径。我们曾在四方所的振动试验台上对UD3型转向架的轴箱弹簧、中央弹簧下的橡胶垫的隔振性能进行了试验。试验结果见表5。 Second, to improve the vibration isolation performance Noise noise generated by wheel and rail impact through the wheelset, axle, bearings, frame, heart and enter the car. Padding the elastic pad at the rigid support to avoid the direct contact between the metal and the metal can cut off the transmission path of the solid sound. We have carried out experiments on the vibration test rig of the Sifang contractor on the axle box spring of the UD3 bogie and the vibration isolation performance of the rubber mat under the central spring. The test results are shown in Table 5.