Analyses Of Dynamic Characteristics For Built-in Steel Spring Floating Slab Track

Steel Spring Floating Slab Track structure SSFST (Steal Spring Floating Slab Track) is akind of mature damping noise reduction measures, can effectively reduce the subway trainvibration effect. At present, this kind of orbital form in the nationwide got very big promotion.Therefore, it is necessary to establish the corresponding calculation model of real-timeeffective for steel spring floating slab track dynamic performance were studied. This paperfocus on built-in steel spring floating slab track dynamic analysis, the main research contentsand results are as follows:1、Lessons from the single and double vibration isolation calculation model, from thevibration isolation theory explains the built-in steel spring floating plate isolation process andprinciple.2、Summarizes the continuity built-in steel spring floating slab track and precast shortplate construction plan for future nanchang rail transit construction to provide technicalreference.3、Using modal analysis, quantitative structure from natural frequency and vibrationmode the perspective of built-in steel spring track vibration isolation process, thecomprehensive analysis of the system parameters on the structural natural vibrationcharacteristic influence.4、Adopts fixed point and harmonic response analysis technology, the quantitativeanalysis of built-in steel spring floating slab track vibration isolation effect, thecomprehensive analysis of the system parameters on the influence of vibration isolation.5、Based on multi-body dynamics software SIMPACK, establish the earth body type Bcar MBS model. Through the modal analysis, to determine the track of the most is notinherent frequency, and through the calculation for the wheel/rail force.6、From the Angle of time domain, a comprehensive system of subway train analysisthrough built-in steel spring floating plate of the dynamic process, and determine the vibrationisolation effect.7、Established the whole ballast bed and built-in steel spring floating slab track-theearth three-dimensional finite model, respectively from the frequency domain and timedomain to analyze the vibration of the earth surface.