Surrogate Granular Materials for Modal Test of Fluid Filled Tanks

Abstract : Experimental vibration certification of launcher cryogenic tanks is an important issue in the aerospace industry. Liquid hydrogen is indeed too dangerous to be used in tank vibration tests. Unlike most fluids used in aerospace industry such as liquid oxygen, surrogate fluids cannot be used to approach the modal behavior of a tank filled with liquid hydrogen because of its particularly low mass density. However granular materials could safely replace liquid hydrogen for vibration testing of tanks.This work aims at proposing an innovative methodology to determine the geometry and the material properties of substitution grains in order to keep the same mode shape and eigen frequencies of a vertical cylindrical tank studied considering 2D horizontal slices. Assuming that the tank slices are sufficiency far enough from the free-surface not to be affected by sloshing effects, the fluid-structure interaction is purely inertial. This methodology is based on the homogenization of a granular material composed of spheres with an elastic behavior. Thus the tank filled with grains can be modeled by a membrane surrounded by a circular beam. An experimental test bench developed to validate the methodology, as well as analytical and numerical simulation results of fluid-beam and membrane-beam interactions, are presented on the first modes.
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https://hal.archives-ouvertes.fr/hal-01413135
Contributor : Véronique Soullier <>
Submitted on : Friday, December 9, 2016 - 2:10:18 PM
Last modification on : Thursday, August 1, 2019 - 2:40:03 PM

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  • HAL Id : hal-01413135, version 1

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Pierre-Louis Chiambaretto, M. Charlotte, Joseph Morlier, Philippe Villedieu, Yves Gourinat. Surrogate Granular Materials for Modal Test of Fluid Filled Tanks. Special Topics in Structural Dynamics, 2016. ⟨hal-01413135⟩

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