强振动环境下缠绕式液压胶管流固耦合特性

Fluid-solid Coupling Characteristics of Steel Wire Winding Hoses under Strong Vibration Environment

针对TBM破岩过程产生基础振动对液压胶管内流体动态特性影响,根据层合板理论建立缠绕式液压胶管振动梁模型,并结合轴向流固耦合模型建立胶管轴向振动动力学模型。运用特征线法求解该数学模型,研究基础振动参数和胶管结构参数对流体响应特性影响,发现胶管出口压力波动幅值随基础振动振幅呈线性增加的趋势,随振动频率增加,在40 Hz左右达到最大,此时振动频率接近系统固有频率;胶管出口压力峰值随液压胶管长度增加而减小,胶管内径在8 mm到30 mm变化时,其先增大后减小,随泊松比增大而增大。研究结果表明振动沿胶管轴向分量加强了流体与胶管互动效应,可为TBM液压管系设计和抗振提供理论依据。

The influence of foundation vibration on hydraulic fluid dynamic performance of hoses during rock breaking process of TBM is studied.The vibration beam model of the rubber hose is established based on laminated plate theory.Combining with axial fluid-solid coupling model,the axial vibration dynamic model of the rubber hose is established.Using characteristic line method,the mathematical model is solved.The influences of the foundation vibration parameters and the structural parameters on the fluid responses are analyzed.It is found that the pressure fluctuation amplitude at the hose outlet increases linearly with the increasing of the amplitude of the foundation vibration;when the excitation frequency is close to natural frequency(about 40 Hz),the fluctuation amplitude will reach the peak value.Secondly,the peak value of the fluctuation pressure at the outlet of the hose decreases as the length of the hose increases.And it increases first and then decreases with the increase of the inner diameter from 8mm to 30 mm.The results show that the axial vibration of the hose strengthens the interaction between the fluid and the hose,which provides a theoretical basis for anti-vibration design of the TBM hydraulic piping systems.