Method for calculating landing test load of amphibious aircraft

Abstract

The invention relates to landing static test load loading technology of an amphibious aircraft, in particular to a method for calculating a landing test load of an amphibious aircraft. According to the method, a piecewise linear function of geometrical shape and pressure distribution is constructed through the total dampening load and action point meeting the requirements of airworthiness regulation terms and the distributed dampening pressure, and the total dampening load and action point in a dampening area are obtained according to the piecewise linear function. According to the pressure piecewise function and the geometrical shape function in the dampening area, a vertical load on each frame is acquired and then according to the pressure distribution of the ship body, a lateral waterload of the ship body is acquired by calculations. The surface pressure of the water load when the amphibious aircraft touches water is converted into the concentrated force which can be directly applied to the static test, the curved surface pressure water load simulation of the complex shape of the hull is realized, the technical problem that the load on the water contact surface of the complexhull is difficult to apply is solved, and a basis is provided for the check of the static strength test of the amphibious aircraft.

Description

technical field [0001] The invention relates to an aircraft static test loading technology, in particular to a method for calculating the water load of an amphibious aircraft landing static test. Background technique [0002] During the landing process of an amphibious aircraft, the impact of the water surface load will cause a large deformation of the body structure. In order to test whether the body structure of the aircraft is safe at the moment of water impact, it is necessary to verify the water landing condition of the static test. The calculation and application of the water landing test load in the static test is the key to the implementation of the static test. [0003] However, the shape of the lower part of the amphibious aircraft is complex, and it is different from the ordinary bottom. Because of its high speed, the structural strength requirements are higher, and the water landing overload is large. Therefore, it has always been a technical problem to simulate ...

AI Technical Summary

Problems solved by technology

[0003] However, the shape of the lower part of the amphibious aircraft is complex, and it is different from the ordinary bottom. Due to its fast speed, the structural strength requirements are higher, and the water landing overload is large. Therefore, it has always been a technical problem to simulate the water landing load of the complex hull.

It is difficult to obtain relevant information about the static test of the amphibious aircraft in the existing public information

Images