Non-invasive vibro-acoustic analysis
AssigneeWayne State University
InventorSean Wu
Life of this patent
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Abstract
A system provides an in situ or non-invasive vibro-acosutic (VA) analysis of an arbitrary complex vibrating structure. The major advantages of this system are that: (1) it allows for an identification of the VA modes that are directly responsible for structural vibration and sound radiation; (2) it enables one to acquire a quantitative description of contributions from individual VA modes that are responsible for resultant structural vibration and sound radiation; and (3) it is non-invasive so that one can conduct an in situ analysis of a machine running under its natural working condition. With this information, one can tackle noise and vibration problems in the most cost-effective manner.
Claims15
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.
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;
- and
- 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.
Dependencies are inferred from the claim text.