Open Access
Vibration studies of a lightweight three-sided membrane suitable for space application
TLDR
In this paper, a three-sided membrane with inwardly curved edges and uniform tension was transmitted by thin steel cables encased in the edges, and the first few vibration modes measured in a near vacuum were shown to be predictable by finite element structural analysis over a range of applied tension loads.Abstract:
Vibration studies carried out in a vacuum chamber are reported for a three-sided membrane with inwardly curved edges Uniform tension was transmitted by thin steel cables encased in the edges Variation of ambient air pressure from atmospheric to near vacuum resulted in increased response frequencies and amplitudes The first few vibration modes measured in a near vacuum are shown to be predictable by a finite element structural analysis over a range of applied tension loads The complicated vibration mode behavior observed during tests at various air pressures is studied analytically with a nonstructural effective air-mass approximation The membrane structure is a candidate for reflective surfaces in space antennasread more
Citations
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The added mass of a flexible plate oscillating in a fluid
TL;DR: In this article, the authors present a review and a numerical study of the fundamental properties of the added mass of a plane flexible plate oscillating in a fluid, where the plate is clamped at one edge and free at the other edges.
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Experimental investigation of added mass effects on a hydrofoil under cavitation conditions
TL;DR: The influence of leading edge sheet cavitation and supercavitation on the added mass effects experienced by a 2-D NACA0009 truncated hydrofoil has been experimentally investigated in a hydrodynamic tunnel as discussed by the authors.
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Membrane vibration experiments: An historical review and recent results
TL;DR: A concise review of the experimental membrane vibration literature can be found in this article, where it is shown both experimentally and theoretically that this unique character allows for a local response to local excitation.
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Corner Wrinkling of a Square Membrane Due to Symmetric Mechanical Loads
TL;DR: In this article, the authors present results from experimental and computational studies performed to characterize the wrinkling behavior of thin-fi[m membranes under mechanical loading, and the results show that as the load increases the number of wrinkles increases, while the wrinkle amplitude decreases.
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Structural Dynamics Experimental Activities in Ultra-Lightweight and Inflatable Space Structures
TL;DR: In this paper, the authors report recently completed structural dynamics experimental activities with new ultra-lightweight and inflatable space structures (a.k.a., "Gossamer" spacecraft) at NASA Langley Research Center, NASA Marshall Space Flight Center, and NASA Goddard Space Flight center.
References
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On Physically Similar Systems; Illustrations of the Use of Dimensional Equations
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Use of Vectors in Vibration Measurement and Analysis
Book
Introduction to the study of aircraft vibration and flutter
TL;DR: This book, although having the same title as the 1938 edition, is an entirely new text, in which the whole subject matter is brought up to date and the theoretical foundations of chain reactions are well set out.
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Preliminary design of large reflectors with flat facets
TL;DR: In this article, a concept for approximating curved antenna surfaces using flat facets is discussed, and a preliminary design technique for determining the size of the reflector surface facets necessary to meet antenna surface accuracy requirements is presented.
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Large Modal Survey Testing Using the Ibrahim Time Domain Identification Technique
TL;DR: The ability of the ITD identification algorithm in identifying a complete set of structural modal parameters using a large number of free-response time histories simultaneously in one analysis, assuming a math model with a high number of degrees-of-freedom, has been studied as mentioned in this paper.