大型船舶外板自重成型工艺参数数值试验分析

为提高大型船舶外板成型加工生产效率,降低试验成本,在考虑大应变效应基础上,采用有限元方法建立了计算模型并经实船板自重成型试验验证.应用数值模型进行系列船体板自重成型数值试验,建立自重成型数据库.以鞍型板为例,分析工艺参数(如长度、宽度、厚度、半径)对钢板成型的影响规律,给出各工艺参数的影响曲线.参考梁理论计算鞍型板自重成型的公式,建立样本数据的回归模型,使回归模型具有一定的物理意义,从而达到较好的回归拟合效果,为编制船体外板自重成型预报系统打下较好的基础.

Numerical analysis of several effective parameters in dead load forming of hull steel plates

To increase the rate of production for the forming operation in the shipbuilding process and reduce the cost of the experiments,the relatively large deflections of sheet are described and the models of finite element method are built and checked up by experimental measures of dead load forming.The database of the calculations for dead load forming of hull steel plates is established.Data of effective parameters of hull saddle-shaped steel plates are measured,and the effect principles of the primary parameters such as length,width,thickness and radius are qualitatively analyzed,and their curves and data tables are presented.According to beam theory formula,mathematical models are constructed with multi-variable stepwise regression analysis method.It is testified that the model can provide basis for editing the prediction system of dead load forming parameters of hull steel plates.