Research on the Water Landing Performance of the Front Hatch of Seaplanes

Considering that the front hatch of a seaplane is subjected to various types of hydrodynamic loads during water landing, this study proposes a finite element analysis approach to evaluate the structural strength of the front hatch under such loading conditions. Using the front hatch structure of a large amphibious aircraft as a case study, finite element models were developed for key load-bearing components, including transverse and longitudinal beams, hinges, skins, and the top retaining block. Given the complexity of load transmission to the top retaining block under both symmetric and asymmetric water loading conditions, the accuracy of the finite element model and analysis methodology was validated by comparing the results of static load testing with the simulated strain data. Based on this validated approach, the static strength of the seaplane’s front hatch under water landing loads was assessed, which provides guidance for the finite element analysis and structural optimization design of other seaplane front hatch.