地效飞机着水冲击载荷理论计算与试验

Theoretical calculation and experiment on impact loads of landing of wing-in-ground aircraft on water surface

针对地效(WIG)飞机遭受冲击最为严重的状态——对称断阶着水情况,对影响冲击的各个因素进行了比较分析,在作了一些基本假设后,采用船舶运动中常用的切片理论思想,结合Von Karman水动力学分析的动量概念及Wagner的附连水质量公式,提出了一种理论计算方法。同时,还将理论计算结果与试验结果进行了比对分析。计算值与试验值的比较结果说明,理论计算在较大程度上是可信的,可作为结构设计外载荷确定的参考。

The symmetric step of hull landing of the wing-in-ground（WIG）aircraft on water surface,which is the most serious situation,is considered.All the factors influencing the impact are analyzed.A theoretic calculation method is proposed based on the assumption of strip theory of ship motion combining with Von Karman＇s momentum equation for hydrodynamics and Wagner＇s formula for calculation of added mass.Experimental results of the impacting loads are compared with those of theoretical calculation.It is shown that the experiment results are in good agreement with the calculation results,indicating that the theoretical evaluation can provide to a great extent useful information for the design of the WIG aircraft.