2,498 research outputs found
Analytical validation of an explicit finite element model of a rolling element bearing with a localised line spall
No full textAbstract not availableSarabjeet Singh, Carl Q. Howard, Colin H. Hansen, Uwe G. Köpk
Outdoor to indoor reduction of wind farm noise for rural residences
No full textAbstract not availableKristy L. Hansen, Colin H. Hansen, Branko Zajamše
Active noise control with virtual sensors in a long narrow duct
No full textColin Kestell and Colin H. Hansen, Ben S. Cazzolat
Higher-order virtual sensing for remote active noise control
No full textJacqueline M. Munn, Ben S. Cazzolato, Colin H. Hansen and Colin D. Kestel
Active control of low-frequency sound in a mining vehicle cabin
No full textColin H. Hansen, Daniel A. Stanef and Richard C. Morgan
Structural radiation mode sensing for active control of sound radiation into enclosed spaces
No full textIn the recent article by Cazzolato and Hansen [J. Acoust. Soc. Am. 104, 2878–2889 (1998)] it was shown that it is possible to derive for a structure some set of surfacevelocity distributions, referred to as radiation modes, which are orthogonal in terms of their contributions to the acoustic potential energy of a coupled cavity. The technique used an orthonormal decomposition to derive an expression for the radiation modes which was based on prior work for free-field sound radiation. It will be shown in the following letter that for the special case involving the calculation of global internal potential energy it is possible to use a simple approach which requires no orthonormal decomposition since the expression for the global potential energy is already in a form that can be easily diagonalized.Ben S. Cazzolato and Colin H. Hanse
Erratum: “Power transmission from a vibrating body to a circular cylindrical shell through passive and active isolators” [J. Acoust. Soc. Am. 101, 1479–1491 (1997)]
No full textCarl Q. Howard and Colin H. Hanse
Power transmission from a vibrating body to a circular cylindrical shell through passive and active isolators
No full textThe transmission of harmonic vibratory power from a vibrating rigid body into a thin supporting cylindrical shell through multiple passive and active isolators is investigated theoretically. The model allows for the transmission of vertical and horizontal harmonic forces and moments about all three coordinate axes. Results show that over a frequency range from 0 to 200 Hz, the real power transmission into the supporting shell can be reduced substantially by employing in parallel with existing passive isolators, active isolators adjusted to provide appropriate control force amplitudes and phases.Carl Q. Howard, Colin H. Hansen, and Jiaqiang Pa
Measurements of the radiation impedance presented to a source in a reverberant room containing a rotating diffuser
No full textAbstract not availableDavid Alan Bies and Colin H. Hanse
The Martin Hansen Story by James H. Wood
No full textNotes - Mr. Jim Wood tells the story of his father-in law, Martin Hansen. Mr. Hansen's life begins in Denmark with his birth on February 13, 1888. He talks of his early farming career where he was made a foreman on a neighbour's farm at the age of sixteen. Mr. Hansen arrived in Athabasca on July 3rd, 1913. He shares many anecdotes of his life, including his service in WWI, his homesteading experience and his family life (3 pages
- …
