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在铁道车辆新造和实现现代化的过程中,由于对客车舒适度的要求不断提高,所以对车内声压级也提出了较高的要求。国际铁路联盟试验研究所(ORE)、国际铁路联盟(UIC)和铁路合作组织(OSShD)均对车内声压级的允许值作了规定(二等车为68dB、一等车为65dB)。上述规定即使在车速较高时也应遵守。由于客车采用了轻结构,使客车地板结构的隔声效果有所下降,因此,目前必须研制出用料少、工艺简单,并符合隔声要求的客车地板。根据原有结构形式的声学状况,在混
In the course of the new construction and modernization of railway vehicles, the sound pressure level in the vehicle has also set higher requirements due to the continuous improvement of the passenger comfort requirements. The ORE, UIC and OSShD both set the permissible values for the sound pressure level in the vehicle (68dB for second-class cars and 65dB for first-class cars). The above rules should be observed even at high speeds. Due to the light structure of the passenger car, the sound insulation effect of the bus floor structure is reduced. Therefore, it is necessary to develop a bus floor with less material, simple technology and sound insulation requirements. According to the original structural form of the acoustic conditions, mixed