中文摘要：

研究目的：高速列车运行引起的振动噪声问题日益受到广泛关注,采用减振型无砟轨道结构可在一定程度上减少该问题。本文以减振CRTSⅢ型板式无砟轨道为研究对象,基于振动理论和有限元方法,建立二维轨道结构频域分析模型,以传递函数和隔振效率为评价指标,研究其在频域内的振动传递特性和隔振性能,分析轨道结构参数对轨道系统隔振效率的影响,并提出相应轨道结构参数的建议值。研究结论：（1）减振CRTSⅢ型板式无砟轨道对中高频有较好的隔振效果;（2）增大轨道板厚度和密度都能提高轨道系统的隔振效率,其中增大轨道板密度的措施更优;（3）建议减振垫层面阻尼的取值范围为0.1～0.25 MN·s/m^3,面刚度在轨道结构变形及受力允许的范围内尽量选取较低值;（4）该研究成果可为减振CRTSⅢ型板式无砟轨道结构的设计与施工提供理论参考。

英文摘要：

Research purposes： Vibration and noise issues caused by high -speed railway have received extensive attention, the application of slab track with anti - vibration structure would be an effective measure to deal with this problem. A study on the harmonic response of CRTS Ⅲ prefabricated slab track with anti - vibration structure was conducted by establishing a 2 - D slab track model in frequency domain. Based on vibration theory and finite element method, transmit function （receptance） and vibration isolation efficiency were taken as two evaluation index in order to research the vibration transmission and vibration isolation performance. From numerical simulation of the impact of the basic slab track parameters on the vibration isolation efficiency, some recommended slab track parameters were put forward. Research conclusions：（ 1 ） CRTS Ⅲ prefabricated slab track with anti -vibration structure has great vibration isolation effect in mid and high frequency area. （2） Increasing the thickness and density of the track slab can improve the vibration isolation efficiency of the track system, and the slab with higher density is more effective. （3） The suggested damping range of the anti - vibration pad is 0. 1MN · s/m^3 - 0.25 MN · s/m^3, and in the allowable range, a lower surface rigidity is preferable. （4） The research results can provide a theoretical reference for the design and construction of CRTS Ⅲ prefabricated slab track with anti - vibration structure.