可渗透圆柱壳流固耦合问题的流场与内力分析

Flow Field and Internal Force in Penetrative Cylindrical Shell with Orifices

在弹性薄壳的非线性理论和流体力学基本方程的基础上,研究了可渗透圆柱壳的流固耦合问题.假定壳体具有均布孔隙且孔的面积很小,不考虑其阻力,忽略对弯曲刚度和壳体腔内流体微小运动影响,应用相容欧拉-拉格朗日法建立了带孔的圆柱壳在流体中相互作用的基本方程。通过具体算例求解,给出了流场速度与压力的变化、圆柱壳的变形及内力分布,并对相关参数进行了讨论。

Based on the nonlinear theory of thin elastic shells and fundamental equations of the fluid mechanics, the formulas of fluid-solid interaction relation for a penetrative shell in fluid are established provided that orifices are too small to ignore the effects on the shell rigidity and the fluid action to the shell. The united Euler-Lagrange method is chosen to construct the equations for a slightly bending cylindrical shell with orifices. As an example, the deformation and the distribution of internal forces of the shell are evaluated, and the effects of the variety of concerned parameters are discussed.