纤维缠绕压力容器封头壁厚预测方法分析

ANALYSIS OF THICKNESS PREDICTION METHOD OF FILAMENT WOUND PRESSURE VESSEL HEAD

为建立准确纤维缠绕压力容器结构模型,在前人壁厚预测方法基础上采用多项式逼近算法来预测压力容器封头纤维层厚度。针对封头部分纤维缠绕角不断变化和极孔附近纱线堆叠等影响因素,采用多项式逼近算法进行封头壁厚预测,并与经典算法、精确算法、平面算法壁厚预测值及实际壁厚测量值对比分析,结果表明运用此方法得到的纤维层壁厚预测值与实际壁厚测量值更接近,从而为分析压力容器可靠性提供准确压力容器结构模型。

For establishing an accurate model for the structure of filament wound pressure vessel,this paper adopt a polynomial approximation algorithm to predict the fiber layer thickness of pressure vessel head on the basis of previous fiber layer thickness prediction method. According to the influencing factors of the changing of fiber winding angle of head part and yarn accumulation near the polar periphery,this paper adopt the polynomial approximation algorithm to predict the fiber layer thickness. Compared with classical method,exact solution,flat solution and actual thickness,it shows that the fiber layer thickness prediction by the method is close to the actual thickness,providing an accurate pressure vessel structure model for the further analysis of the reliability of the pressure vessel.