An elastic-plastic B spline finite strip method is proposed to investigate the continuous plate straightening process in this paper. First, the B spline displacement function that satisfies the boundary conditions of simply supported end and free end of the strip element is established, and then the stress-strain matrix is established. Second, the set method of total stiffness matrix based on B spline finite strip method for plate straightening problem is proposed, and the influence of nodal line number and strip elements number on the sparsity of total stiffness matrix is analyzed. Third, the loads on the strip elements are taken as linear uniform distribution, and the transformation matrix between the equivalent linear load and the actual load of the strip element is established. At last, the plate straightening simulation of 11 rolls straightening machine is made based on the elastic-plastic B spline finite strip method, the calculated results agree with the measured results, which approves that the elastic-plastic B spline finite strip method established can be applied to the plate straightening process.

为了研究板的连续矫直过程，提出了一种弹塑性B样条有限条法。首先，建立满足条形单元简单支撑端和自由端边界条件的B样条位移函数，然后建立应力应变矩阵。其次，提出了基于B样条有限条法的总刚度矩阵的设置方法，以解决钢板矫直问题，分析了节点线数和条形单元数对总刚度矩阵稀疏度的影响。第三，以条形单元上的载荷为线性均匀分布，建立了条形单元等效线性载荷与实际载荷之间的转换矩阵。最后，