3 Day Open Conference

Multi-disciplinary design and optimization of an aircraft landing gear
Tuesday 18th November 2008
16.00 - 16.20
Auditorium 2

We will be presenting the multi-disciplinary design of an aircraft landing gear using HyperWorks. This landing gear is designed for aircraft landing and taxiing cases. For the landing event, the energy of the descending aircraft must be absorbed by the landing gear without generating reaction loads that exceed the design limit loads. This reaction load, as a function of landing gear stroke, is referred to as the Dynamic Load-Stroke Curve. In the first part of the design process, the damping characteristics of the landing gear are optimized such that the Dynamic Load-Stroke Curve never exceeds the Dynamic Load Envelope. MotionView is used for multi-body dynamics pre- and post-processing, MotionSolve is used for the multi-body dynamics analysis and HyperStudy is coupled with MotionSolve for optimization. Taxiing can be simulated as two discrete events: braking and turning. These events generate high stresses in the torsion links and lugs. In the second part of the design process we will be presenting the topology and shape optimization of these components such that the maximum stresses do not exceed 120ksi. HyperMesh is used for finite element modeling and OptiStruct is used for optimization.

About the Speaker(s):

Warren Dias
Application Specialist, Optimization
Altair Engineering, Inc., USA

Warren Dias has been working with Altair Engineering for the last 8 years now. He started his career with Altair in the Product Design and Development group in India where he worked for 2 years and thereafter assuming the role of Technical Manager for North India over 5 years. His experience includes working with many auto and aero OEM`s and suppliers with a focus on design optimization. Warren currently works at Altair Engineering, MI, US as the Application Specialist for Optimization.