Non-invasive vibro-acoustic analysis
AssigneeWayne State University
InventorSean F. Wu
Life of this patent
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Abstract
A system provides an in situ or non-invasive vibro-acoustic (VA) analysis of an arbitrary complex vibrating structure. The noise diagnostic system includes a plurality of first transducers for measuring acoustic pressure in a sound field near a noise source. At least one second transducer measures normal surface velocity on the noise source. A computer acquires acoustic pressure data from the plurality of first transducers and normal surface velocity data from the at least one second transducer. The computer generates a transfer matrix representing a correlation between normal surface velocity on the noise source and the acoustic pressure in the sound field.
Claims17
A noise diagnostic system comprising:
- a plurality of first transducers for measuring acoustic pressure in a sound field near a noise source;
- at least one second transducer for measuring normal surface velocity on the noise source;
- and
- a computer acquiring acoustic pressure data from the plurality of first transducers and normal surface velocity data from the at least one second transducer, the computer generating a transfer matrix representing a correlation between normal surface velocity on the noise source and the acoustic pressure in the sound field, wherein the computer is programmed to decompose the transfer matrix into a plurality of vibro-acoustic modes.
A method for diagnosing a noise source including the steps of:
- a) determining acoustic pressure in a sound field near a noise source;
- b) determining acoustic pressure on a surface of the noise sources;
- c) determining normal surface velocity on a surface of the noise source;
- d) generating a transfer matrix representing a correlation between the normal surface velocity on the surface of the noise source and the acoustic pressure in the sound field;
- and
- e) decomposing the transfer matrix into a plurality of vibro-acoustic modes.
Dependencies are inferred from the claim text.