Department of Mechanical Engineering

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In this paper, the results of a optimization study carried out for the selection of landing gear parameters of an aircraft are presented. The landing gear parameters are optimized for the two qualitatively different conditions of operation of the aircraft namely landing and taxying. The relative importance of various parameters is brought out and some simple guidelines are suggested for the optimum selection of the landing gear parameters. Finally, a suggestion for employment of a dual spring in the shock absorber is made.

World University root node

American Society of Mechanical Engineers (Paper)

OPTIMIZATION OF AIRCRAFT UNDERCARRIAGES.

Journal of Aircraft

Comparison of linear and nonlinear dampers for landing gears

Optimization of an oleo-pneumatic shock absorber of an aircraft during landing

Dual-phase damping in a landing gear at touch-down

In this note, the application of dual-phase damping to a simple shock mount experiencing a harmonic input is described. The damping ratio is a function of the relative displacement between the foundation and the mounted mass. The purpose of employing such a damping is to reduce the absolute transmissibility over the whole frequency range. © 1975, Academic Press Inc. (London) Limited. All rights reserved.

Journal of Sound and Vibration

Harmonic response of a shock mount employing dual-phase damping

The new concept of Information Sets and its application in iris recognition

The present study focuses on deciphering various aerodynamic phenomena and flow structures that explains the principles of lift generation in tiny insects. Simulations are performed on three-dimensional elliptical wings performing “clap and fling” motion based on the flight of Encasia Formosa. In this regard, a numerical fluid solver based on D3Q19 multiple relaxation time (MRT) model of lattice Boltzmann method (LBM) is developed. To justify the applicability of LBM on the moving boundaries, validations have been performed for the cases of hovering flat plate and sedimentation of a sphere in a fluid tank at different Reynolds numbers. The influence of the kinematic parameters such as rotational-translational overlap ξ (0% - 100%) and Reynolds number (Re = 10 and Re = 50) on the behaviour of lift and drag is examined. It is observed that overlap is the most influential parameter as lift to drag ratio at ξ = 100% is almost an order of magnitude higher than at ξ = 0% and is attributed to the attachment of a strong leading-edge vortex (LEV) during the clap phase in the former. Only a slight variation in lift to drag ratio is witnessed with Reynolds number for the small range considered in this work.