Theoretical Simulation and Experimental Study of Dynamic Characteristics of Dynamic Stabilization Unit-track System
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摘要: 针对动力稳定装置与轨道复杂的耦合特性,基于键合图理论建立动力稳定装置-轨道耦合系统。为更加贴切动力稳定装置的实际工作状态,对动力稳定装置持续作业期间的自由度问题,轮轨间Hertz非线性接触特性与轮轨接触角度问题以及轮轨间间隙传动问题做出具体分析。并结合键合图理论与Euler梁理论建立动力稳定装置与轨道耦合系统完整的键合图模型。经动力稳定车现场作业试验数据计算机仿真结果在时域与频域上对比分析,验证理论模型的正确性,可以被应用于不同激振频率的动力稳定装置动态特性分析。Abstract: To understand the complex coupling characteristics of a dynamic stabilization unit-track coupling dynamic model, the complex nonlinear dynamic system of a dynamic stabilization-track coupling system based on the bond graph theory was established. In order to better demonstrate the actual working state of the dynamic stability device, the problems of the degree of freedom of the dynamic stabilization unit during continuous operation, roller-rail Hertz non-linear contact, roller-rail contact angle and roller-rail gap were analyzed in detail. A complete bond graph model of the coupling system between dynamic stabilizer and track was established by applying the bond graph theory and the Euler beam theory. The theoretical model was proven to be correct by the comparing the field operation test data of the dynamic stability vehicle in its time domain and frequency domain, which can be applied to analyzing the dynamic characteristics of a dynamic stability device with different excitation frequencies.
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Key words:
- dynamic stabilization unit /
- bond graph theory /
- Euler beam /
- degree of freedom
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表 1 模型参数
参数 数值 钢轨单位长度质量/(kg·m-1) 60.64 钢轨弹性模量/(N·m-2) 2.059×1011 钢轨对垂直轴截面惯性矩/m4 0.524×10-5 钢轨密度/(kg·m-3) 0.786×104 轨枕质量/kg 237 单根钢轨扣件间距/m 0.6 扣件横向刚度/(MN·mm-1) 8.79 扣件横向阻尼/(N·s·m-1) 1 927.96 轨枕道砟间刚度/(MN·mm-1) 6×10 轨枕道砟间阻尼/(N·s·m-1) 3.5×103 单个动力稳定装置质量/kg 3 500 动力稳定装置转动惯量/(kg·m2) 5 000 动力稳定装置走行速度/(km·h-1) 1.5 动力稳定装置所受下压力/kN 4×60 动力稳定装置夹持力/kN 6.9 -
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