Transfer Matrix Modeling and Analysis for Fluid-structure Interaction System of Control Valve-pipe Conveying Fluid
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摘要: 为了揭示控制阀-输流管道系统的流固耦合振动规律，研究了系统的传递矩阵模型建模方法。以一个带有单座式调节阀的固定-简支输流管道的振动分析为例，考虑调节阀内及管道内流固耦合作用，将控制阀阀体作为刚体，控制阀内部阀芯-阀杆-薄膜简化为单自由度质量-弹簧-阻尼系统，输流管道简化为弹性连续梁模型，建立了基于线性假设的控制阀-输流管道流固耦合系统的传递矩阵模型。仿真分析了给定工况下系统的固有特性和稳态简谐时域和频域响应，证明了传递矩阵模型的有效性；同时，通过与单一控制阀模型和单一输流管道模型的仿真对比，揭示了控制阀与输流管道流固耦合相互作用对系统振动响应的影响规律。Abstract: For revealing of fluid-structure interaction vibration of control valve-pipe conveying fluid control system, the transfer matrix modeling method for the system is studied. Taking a fixed-pinned pipe conveying fluid with a single seat control valve as an example, the valve body is simplified as a rigid body, the valve core-stem-spring diaphragm as a single freedom mass-spring-damping system, the pipe conveying fluid as elastic beams. Considering the fluid-structure interaction inside the control valve and the pipes, the transfer matrix model of the system is build based on linearity hypothesis. The simulation analysis of steady state harmonic time domain and frequency domain responses are carried out under the given operating conditions, and the effectiveness of the transfer matrix model for the valve-pipe system is testified; meanwhile, the influence of fluid-structure interaction on the vibrations response of the pipe system is revealed by comparison with single valve and single pipe model, respectively.
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Key words:
- valve-pipe system /
- fluid-structure interaction /
- models /
- transfer matrix method /
- frequency domain analysis /
- vibration /
- simulation
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表 1 调节阀-输流管道系统固有频率
阶数 1 2 3 4 固有频率/Hz 传递矩阵模型 19.24 40.9 191.94 272.79 有限元模型 18.60 41.78 189.62 282.45 相对误差/% 3.4 2.1 1.2 3.4 
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