RT Generic
T1 Fuel sloshing effect on dynamic loads
A1 Pérez Muñoz, José Daniel
AB The aim of this paper is to study how the effect of fuel sloshing can help to reducethe dynamic loads on the wing. The aircraft chosen for the study is the Airbus A400Mmilitary transport aircraft (Figure 1.1). Moreover, since the purpose is to understand ina better way the behavior of the aircraft, this paper could make the actual model (whichis very precise) to be even more accurate in conditions with significant fuel movementcompared with the real behavior. Chapter 1 will demonstrate that the critical case for sizing of the wing is an intermediatefuel contents configuration and will prove that a higher damping helps toreduce dynamic loads. An estimation of the dynamic loads reduction is presented forthe A400M case. This chapter also comments different ways to model the sloshingproduced by liquids and how it has been treated in certain fields of industry.In Chapter 2, a simplified model in NASTRAN is created to reproduce in a simplerway the behaviour of the wing. The main dynamic parameters of the wing (modalfrequencies and modal shapes) have been used to create this model. Different variationsand models are used in order to study the effect of fuel in dynamic loads.Chapter 3 presents a virtual test and describes the model used in Pam-Crash, theSPH (Smoothed Particle Hydrodynamics) technique and how to apply it. SPH techniqueis an advanced tool for representing liquid behaviour and by which more accurateresults could be obtained.Chapter 4 covers the result of the virtual test applied to the Pam-Crash model. Itincludes the evolution of main parameters with the variation of fuel and ribs configurations.Chapter 5 proposes how to relate Pam-Crash data with NASTRAN data throughtwo ways. It also contains the expected benefits that this test could bring to theindustry.Chapter 6 proposes future work (improvements for the virtual test and a real physicaltest with its budget) and summarizes the steps followed.
YR 2014
FD 2014-06-19
LK http://hdl.handle.net/10016/22926
UL http://hdl.handle.net/10016/22926
LA eng
DS e-Archivo
RD 30 abr. 2024