跨座式单轨车体表面的脉动风速时程模拟OA
Simulation of Fluctuating Wind Speed Histories for the Surfaces of Straddle Monorail Vehicles
为充分考虑横风载荷对跨座式单轨动力学仿真的影响,并提升风载模拟精确性,以重庆轨道交通2号线单轨车体为对象,对其侧面进行节点划分,构成多点脉动风速时程模拟节点集.结合Davenport风速谱理论及线性滤波法的自回归(AR)模型理论,利用MATLAB建立多点脉动风速时程AR模型,分析各节点脉动风速时程结果的模拟精度,并通过UM仿真验证风速时程精度.结果表明:该模型能够实现多点脉动风速时程的模拟,且基本能够保证模拟精度;接近节点集几何中心的节点拟合效果更好,而靠近节点集几何边界的节点拟合效果较差.通过分析结果的精确度,验证模拟风速时程与实际脉动风速的一致性,为跨座式单轨风载研究提供相关理论依据.
To fully consider the influence of crosswind loads on the dynamic simulation of straddle monorails and im-prove the accuracy of wind load simulation,a monorail vehicle of Chongqing Rail Transit Line 2 was taken as the object for study.The flank of the vehicle was represented by a set of nodes,and a node set for multi-point simulation of fluctuating wind speed histories was constructed.Based on the Davenport wind speed spectrum theory and the autoregressive(AR)mod-el theory of linear filtering method,an AR model for computing multi-point fluctuating wind speed histories was established in MATLAB code.The accuracy of wind speed histories of different nodes was analyzed and verified through UM simula-tion.The result indicates that the established AR model can realize the simulation of multi-point fluctuating wind speed histo-ries with the accuracy basically guaranteed.The simulation accuracy is higher for the nodes near geometric center,while low-er for nodes near geometric boundary.Through the analysis of the accuracy of results,it is verified that the actual fluctuating wind speed is consistent with the simulated wind speed histories.The results of this study may provide a theoretical basis for further study of wind loads on straddle monorail vehicles.
周新建;范金正;冀杰
华东交通大学 机电与车辆工程学院,南昌 330013华东交通大学 机电与车辆工程学院,南昌 330013西南大学 工程技术学院,重庆 400715
交通工程
振动与波跨座式单轨风速模拟脉动风速时程Davenport风速谱理论自回归模型
vibration and wavestraddle monorail vehiclesimulation of wind speedfluctuating wind speed historiesDavenport wind speed spectrum theoryautoregressive model
《噪声与振动控制》 2026 (2)
20-25,53,7
国家自然科学基金(52065020)
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