阻尼浆对地铁车体铝型材地板振动声辐射影响测试研究

Test study of the influences of damping pulp on aluminium flooring profile vibration-sound radiation of metro carbody

为研究某种阻尼浆材料对地铁车体铝型材地板的振动声辐射影响,在声学实验室内,对没喷涂阻尼浆的地板、喷涂2 mm和4 mm厚阻尼浆的地板分别进行了振动声辐射测试分析。结果表明,喷涂阻尼浆可显著抑制铝型材地板的振动声辐射,且随阻尼层喷涂厚度的增加,抑制越显著,尤其在中高频区段。

In order to study the influences of damping pulp on aluminium flooring profile vibrationsound radiation of metro carbody, vibration-sound radiation test and analysis of uncoated sheet, 2 mm and 4 mm thick damping pulp coated sheet were conducted separately in acoustic laboratory. The results show that the damping pulp painting can significantly inhibit vibrationsound radiation, and the thicker damping pulp layer, the more significant inhibiting effect, especially in mediumhigh frequency section.