生理参数条件下传输性负载对流固耦合管道流场的影响

为了揭示人体血管中流体-固体-负载之间的耦合关系，通过理论推导和双向流固耦合的方法，建立了一个完备的人体血液循环系统模型，推导了血压振幅的理论解。改变出口条件和管壁弹性模量，共计算了8个算例。模型成功模拟了压力波传播的现象，压力与生理实际符合。结果表明：人体生理循环系统中血压的振幅由压力波传播性质决定，血管内压力的模拟结果与理论解相互吻合，负载在流固耦合系统中会产生二次压力波，压力波和负载为血管的力学模型中需要考虑的2个重要因素。

Effect of Transmission Loads on Physiological Parameter-based Fluid-Structure Interaction Pipes

To reveal the form of the coupling relationship among the flow, the solid and the load in the human arterial system, two-way fluid-structure interaction was used to build an idealized complete human arterial system model. Eight cases were simulated under different outlet conditions and Young’s modulus. This model successfully simulated the pressure wave propagation, and the pressure accorded with the physiological reality. Results show that theoretical researches of pressure wave are identical with the simulate results. Transmission load can produce a secondary pressure fluctuation. The influences of the pressure wave and transmission load are considered for construction of the hemodynamic model.