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充气囊体除了受自重影响外,最重要的外荷载即为来流风压,研究充气囊体的表面风压分布具有重要的工程意义.目前的流体力学技术求解任意外形充气囊体表面风压是不可能的.本文针对轴对称体型充气囊体,根据源汇与平行流复合的方法将其压力分布归结为求解第一类Fredholm方程.改进了Tikhonov正则化方法,求解某充气囊体的表面风压分布,并与实验结果对比,表明该方法求解旋转体型囊体表面风压是有效的.本文还给出Tik-honov正则化方法小参数的选取建议,对工程应用有重要意义.
In addition to the self-weight of the inflated balloon, the most important external load is the inflow pressure, and it is of great significance to study the surface pressure distribution of the inflated balloon.At present, the hydrodynamic technique solves the problem that the surface pressure of an inflatable balloon with any shape is It is impossible to solve the first type of Fredholm equation according to the method of source-sink and parallel-stream compounding.An improved Tikhonov regularization method is proposed to solve the surface wind of an inflatable balloon Pressure distribution and compared with the experimental results show that this method is effective to solve the surface pressure of the rotating body type capsule.The selection of small parameters of the Tik-honov regularization method is also given in this paper, which is of great significance to engineering application.