Transcription of Chapter 5 Shock Absorber Design - Virginia Tech
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Chapter 5 Shock Absorber Design - Virginia Tech
40 Chapter 5 Shock Absorber IntroductionThe basic function of the Shock Absorber is to absorb and dissipate the impact kineticenergy to the extent that accelerations imposed upon the airframe are reduced to a tolerablelevel [2 and 20]. Existing Shock absorbers can be divided into two classes based on thetype of the spring being used: those using a solid spring made of steel or rubber and thoseusing a fluid spring with gas or oil, or a mixture of the two that is generally referred to asoleo-pneumatic. The high gear and weight efficiencies associated with the oleo-pneumaticshock Absorber make it the preferred Design for commercial transports [2].Based on the analysis procedure as outlined in this Chapter , algorithms were developedto determine the required stroke and piston length to meet the given Design conditions, aswell as the energy absorption capacity of the Shock Oleo-Pneumatic Shock Strut DesignThe basic weight support function of the oleo-pneumatic Shock struts, which have ahigh efficiency under dynamic conditions both in terms of energy absorption anddissipation, is provided by a compressed cylinder
41 Axle Piston Air Valve Upper Bearing Lower Bearing Seal Upper Chamber (Air) Metering Pin Orifice Orifice Support Tube Lower Chamber (Oil) Figure 5.1 Single-acting shock absorber…
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