二阶激波膨胀法(以下简称二阶法),经过Jackson,DeJarnette等人的改进,已推广应用于球头旋成体压力分布的计算,并且进一步提高了计算准确度,但是应当指出,二阶法目前仍然存在一些缺陷,例如: 1.该方法是用和旋成体相切的“分段截锥体”近似代替光滑曲线的旋成体(见图1),只能 The second-order shock expansion method (hereinafter referred to as the second-order method) has been widely applied to the calculation of the pressure distribution in the ball-and-socket body through the improvement of Jackson and DeJarnette et al. And further improves the calculation accuracy. However, it should be pointed out that the second order There are still some shortcomings in the method, for example: 1. The method is to replace the smooth curvilinear body (see Figure 1) with a “segmented frustum” tangent to the body,