Resonance frequencies of a spherical aluminum shell subject to static internal pressure

Piacsek, Andrew A.; Abdul-Wahid, Sami; Taylor, Robert P.

doi:10.1121/1.4721647

Cited by 10 publications

(2 citation statements)

References 9 publications

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“…The "geometric non-linearity effects" setting in COMSOL was also included in the model to account for pressure effects on shell curvature-finite thickness interactions [9].…”

Section: Mathematical Model-using the Comsol Shell Physics Interface Thementioning

confidence: 99%

Modal Propellant Gauging: High-resolution and non-invasive gauging of both settled and unsettled liquids in reduced gravity

et al. 2019

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The modal response of a liquid-filled tank to external acoustic excitation can be used to infer with high resolution the mass of contained liquid, the mass flow rate of liquids into and out of the tank, and changes in tank pressure. Both contained liquid mass and internal ullage pressure affect the modal response of the tank walls through fluid mass-loading of the tank walls and pressureinduced wall stiffening, respectively. Modal Propellant Gauging refers to the technology that exploits these shifts in modal frequencies to infer the mass of propellant in a tank. MPG is a noninvasive gauging technology that has demonstrated gauging resolutions of 1% for settled propellants and 2-3% for unsettled, sloshing propellants. Extensive parabolic flight testing of the MPG system on model tanks has been conducted to validate the technology in reduced gravity. MPG testing on a qualification tank for the Orion Program's European Service Module has also been conducted and is reported here. Finite element modeling of the Orion ESM ″upper" tank is discussed and compared with measurement data. Three computational approaches to mass determination, Peak Tracking, Point Sensor, and Spectral Density methods, are described here. Use cases are defined and analyzed in the context of the Orion ESM Qualification tank data, and an implementation scheme for continuous mass gauging on the Orion ESM is discussed.

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“…The "geometric non-linearity effects" setting in COMSOL was also included in the model to account for pressure effects on shell curvature-finite thickness interactions [9].…”

Section: Mathematical Model-using the Comsol Shell Physics Interface Thementioning

confidence: 99%

Modal Propellant Gauging: High-resolution and non-invasive gauging of both settled and unsettled liquids in reduced gravity

et al. 2019

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“…It is established that both external and internal static pressures can provoke a shift of the spherical shell resonance frequencies. 34 Also, frequency response vs the displacement of the acoustic source was characterized with a Laser Doppler Vibrometer (LDV); this technique is presented in the first part of this work. 27 The measurement points were positioned at the center of aperture.…”

Section: Experimental Study In a Water Tank And Validation Of The Ope...mentioning

confidence: 99%

An autonomous low-power management system for energy harvesting from a miniaturized spherical piezoelectric transducer

Diab

Lefebvre²,

Nassar³

et al. 2019

Review of Scientific Instruments

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A new spherical vibrational energy harvesting device with an additional low power management circuit for optimizing the power transfer from the mechanical vibrations to a storage capacitor is presented. The device is devoted to underwater wireless sensor network applications due to its broadband vibrational energy harvesting, sensing, and communicating facilities. The sensing node container consists of two acrylic glass (PMMA) half-spherical shells and a Pz26 piezoelectric ring clamped between the shells. The energy harvesting, the management circuit, and communication electronics were fitted within the hollow portion of the sphere. A simulation model of the energy extraction and management system using SPICE has been developed. This simulation shows the feasibility and efficiency of the low power extraction circuit; a level of the necessary stored voltage was set at 3 V. The numerical model was validated by underwater experimental measurements; a voltage of 3 V was obtained at the terminals of a storage capacitor (47 µF) which was sufficient to supply the communication electronics. Power harvesting performances were measured relative to the transmitter/sensor distance and the incident acoustical field excitation voltage. Finally, 175 µW of harvested power has been measured with an excitation voltage of 8 Vpp at 5 cm distance from the emitter.

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Free vibration analysis of a fluid-filled functionally graded spherical shell subjected to internal pressure

2022

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Resonance frequencies of a spherical aluminum shell subject to static internal pressure

Cited by 10 publications

References 9 publications

Modal Propellant Gauging: High-resolution and non-invasive gauging of both settled and unsettled liquids in reduced gravity

Modal Propellant Gauging: High-resolution and non-invasive gauging of both settled and unsettled liquids in reduced gravity

An autonomous low-power management system for energy harvesting from a miniaturized spherical piezoelectric transducer

Free vibration analysis of a fluid-filled functionally graded spherical shell subjected to internal pressure

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