Harmonic Vibration Test for the Analysis of the Dynamic Behaviour of Polyurethane Foams
| Autor: | Evelyne Aubry, Olivier Duboeuf, Raphaël Dupuis, Marc Lauth |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Bode plot Phase (waves) Compression set 02 engineering and technology 021001 nanoscience & nanotechnology Compression (physics) Vibration chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Shaker Composite material 0210 nano-technology Transmissibility (structural dynamics) Polyurethane |
| Zdroj: | Dynamic Behavior of Materials, Volume 1 ISBN: 9783319224510 |
| DOI: | 10.1007/978-3-319-22452-7_10 |
| Popis: | The main goal of this paper is to describe experimental techniques and identification of dynamic properties of flexible polyurethane foam. Indeed, automotive seat comfort level is established with considering quasi-static - density core, hysteresis loss and compression set - and dynamic -transmissibility and damping - properties of flexible polyurethane foams. Our dynamic system, modeled as a single degree-of-freedom system, is composed of an experimental device with a free mass on the top and a shaker on the basement. The first one, a rigid block, is mounted on a 100x100x50 mm cube sample of foam material and the second one excites the device with harmonic vibration. The steady-state response of a polyurethane foam sample – after the same number of cycles – to harmonic vibration is analyzed for different excitation amplitude level and for different initial compression level, corresponding respectively to various road surface conditions and to various apparent-mass. The transmitted vibration between the shaker and the free mass is measured to determine the damping power and the filter band of polyurethane foam, and enables to trace the Bode magnitude and phase plots of the dynamic stiffness function of the system. The results presented here compare 3 types of OEM foams. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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