CAJ | 학술논문

对螺旋桨进行优化时，需要建立起优化计算的样本空间，即要实现初始桨的参数化建模。本文基于贝塞尔曲线拟合原理编程实现了螺旋桨的参数化建模，对螺旋桨的径向参数分布分别用一条贝塞尔曲线进行拟合，曲线的控制点通过遗传算法寻优求得。文中以4382桨为例，对其进行参数化建模，讨论了三、四、五、六阶贝塞尔曲线的拟合效果，发现三阶贝塞尔曲线拟合光顺性最好、拟合平均误差可以控制在0.3%以内，而且控制点个数较少，最适合拟合螺旋桨径向参数分布。最后通过调整三次贝塞尔曲线控制点的位置调整了原桨叶的几何形状，得到光顺性较好的新桨叶模型，表明该参数化建模方法合理。
대라선장진행우화시，수요건립기우화계산적양본공간，즉요실현초시장적삼수화건모。본문기우패새이곡선의합원리편정실현료라선장적삼수화건모，대라선장적경향삼수분포분별용일조패새이곡선진행의합，곡선적공제점통과유전산법심우구득。문중이4382장위례，대기진행삼수화건모，토론료삼、사、오、륙계패새이곡선적의합효과，발현삼계패새이곡선의합광순성최호、의합평균오차가이공제재0.3%이내，이차공제점개수교소，최괄합의합라선장경향삼수분포。최후통과조정삼차패새이곡선공제점적위치조정료원장협적궤하형상，득도광순성교호적신장협모형，표명해삼수화건모방법합리。
A method of propeller parametric modeling is needed to establish the sample space for optimization calculation in propeller optimization. Propeller parametric modeling is realized by programing based on the principle of bezier curve fitting. Every radial parameter distribution of the propeller is fitted by a bezier curve. The control points can be exactly found by genetic algorithm. Parametric modeling of propeller 4382 is established by the method, and the fitting effects of three, four, five and six order bezier curve are discussed. The fitting fairness of three order bezier curve is the best, and the mean error is less than 0. 3%. Finally, the original geometry of the propeller is adjusted by adjusting the control points of the curve. The geometry of the propeller after adjustment is fairing, the result shows that the method is reasonable.