高速铁路板式轨道高架桥梁结构噪声辐射特性分析

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1、兰州交通大学硕士学位论文(4)Thegroundreflectionandthevelocityoftrainhaveobviouseffectonthebridgestructurenoiseradiation,andtheinfluenceofstiffnessoffastenersonthatisweak,andthesoundbarriersalmosthaveoninfluenceonit.(5)Modalacoustictransfervectorcanadequatelycombinedvibrationcharacteristicsoftheboxitself,soitcanm

2、oreaccuratelyreflectstheinfluenceoftheboxbridgeitselfstructurecharacteristicsonitsstructurenoiseradiation;underdifferentfrequencies,thecontributionofaplatetofieldpointsisdifferent,anditcanbedividedintopositive,negativeandneutralcontribution.KeyWords：High-speedRailway;SlabTrack;ElevatedBox-bridge;Str

3、ucturevibration;StructureNoiseRadiationCharacteristics-III-万方数据高速铁路板式轨道高架桥梁结构噪声辐射特性研究目录摘要.............................................................................................................................IAbstract.............................................................................

4、........................................................II1绪论........................................................................................................................................11.1研究背景...............................................................................................

5、......................11.2高架桥梁结构噪声的研究现状.................................................................................31.3当前研究中存在的问题..............................................................................................41.4本文的主要研究内容及创新........................................................

6、.............................42列车-轨道-桥梁耦合动力学模型.........................................................................................52.1列车-轨道-桥梁耦合动力学模型...............................................................................52.1.1机车车辆动力学模型....................................................

7、...................................52.1.2板式轨道-桥梁有限元模型.............................................................................62.2列车-轨道-桥梁耦合系统运动方程..................................................