Since 2-D hypersonic inlet should work with Mach numer ranging from 4.5 to 6.0

an elastically deformable scheme of inlet's compression surface with multiple forces was explored in this work. With numerical computation

the optimal number of forces was firstly studied. The results showed that three forces were more effective in elastic deformation. Then the inlet deformation with the three forces was analyzed by the method of fluid-structure interaction (FSI). The results indicated that the distribution of static pressure on the deformable compression surface was almost consistent with that on the ideal surface. The results of performance analysis demonstrated that the flow coefficient of the 2-D inlet designed at Mach numer is 6.0 could reach 0.98 at Mach numer is 4.5 and 1.00 at Mach numer is 5.0 after deformation. Furthermore

the total pressure at exit section just remained unchanged compared with fixed geometry inlet. These indicate that the elastically deformable scheme of 2-D inlet with multiple forces is feasible

and also helpful to improve the inlet's characteristics at off-design points.