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首页> 外文期刊>Journal of Fluids and Structures >Fluid-structure interaction in water-filled thin pipes of anisotropic composite materials
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Fluid-structure interaction in water-filled thin pipes of anisotropic composite materials

机译：各向异性复合材料充水细管中的流固耦合

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摘要

The effects of elastic anisotropy in piping materials on fluid-structure interaction are studied for water-filled carbon-fiber reinforced thin plastic pipes. When an impact is introduced to water in a pipe, there are two waves traveling at different speeds. A primary wave corresponding to a breathing mode of pipe travels slowly and a precursor wave corresponding to a longitudinal mode of pipe travels fast. An anisotropic stress-strain relationship of piping materials has been taken into account to describe the propagation of primary and precursor waves in the carbon-fiber reinforced thin plastic pipes. The wave speeds and strains in the axial and hoop directions are calculated as a function of carbon-fiber winding angles and compared with the experimental data. As the winding angle increases, the primary wave speed increases due to the increased stiffness in the hoop direction, while the precursor wave speed decreases. The magnitudes of precursor waves are much smaller than those of primary waves so that the effect of precursor waves on the deformation of pipe is not significant. The primary wave generates the hoop strain accompanying the opposite-signed axial strain through the coupling compliance of pipe. The magnitude of hoop strain induced by the primary waves decreases with increasing the winding angle due to the increased hoop stiffness of pipe. The magnitude of axial strain is small at low and high winding angles where the coupling compliance is small.
机译：研究了充水的碳纤维增强塑料薄管在管道材料中弹性各向异性对流固耦合的影响。当管道中的水受到冲击时，会有两波以不同的速度传播。与管道的呼吸模式相对应的一次波传播缓慢，而与管道的纵向模式相对应的前波传播很快。已经考虑到管道材料的各向异性应力-应变关系，以描述碳纤维增强的薄塑料管材中主波和前驱波的传播。根据碳纤维缠绕角度计算轴向和环向的波速和应变，并与实验数据进行比较。随着缠绕角度的增加，初级波速度由于在环向方向上增加的刚度而增加，而前体波速度则下降。前驱波的幅度远小于一次波，因此前驱波对管道变形的影响不明显。初级波通过管道的耦合顺应性产生伴随相反符号轴向应变的环向应变。由于增加的管箍刚度，初级波引起的箍应变的大小随缠绕角度的增加而减小。在耦合柔度小的情况下，在低和高绕组角下，轴向应变的大小较小。

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