When the aircraft is landing and taking off, the ground will have a great impact on the aircraft and bumps and vibrations, which will have a great impact on the structure and safety of the aircraft. Buffers are often used on aircraft to reduce shock and vibration loads and absorb impact energy. The main function of the shock absorber is to absorb the impact energy, so that the impact load step transmitted to the structure on the body exceeds the allowable value. In the process of absorbing energy, the shock absorber oscillates back and forth to dissipate the absorbed energy into heat energy.
Meet aircraft design requirements
(1) strength, stiffness requirements; (2) fatigue, durability requirements; (3) damage tolerance; (4) maintainability requirements; (5) airworthiness requirements; (6) reasonable material selection; (7) process requirements (8) economic requirements; (9) weight requirements; (10) lightning protection requirements; (11) corrosion resistance requirements.
Meet the functional requirements of the landing gear
(1) In the compression stroke (positive stroke), the load on the damper device should increase as the amount of compression increases.
(2) During the absorption process, the damping device should generate large deformation to absorb the impact energy to reduce the impact force of the body and have better heat dissipation.
(3) In the extension stroke (reverse stroke), the shock absorber should convert most of the absorbed energy into heat energy dissipation.
(4) The damping device must have the ability to continuously accept the impact.