Control of Noise and Structural Vibration: A MATLAB®-Based by Qibo Mao PDF

By Qibo Mao

ISBN-10: 1447150902

ISBN-13: 9781447150909

ISBN-10: 1447150910

ISBN-13: 9781447150916

Control of Noise and Structural Vibration provides a MATLAB®-based method of fixing the issues of bad noise new release and transmission by means of constructions and of bad vibration inside of constructions according to environmental or operational forces. the basics of acoustics, vibration and coupling among vibrating constructions and the sound fields they generate are brought together with a dialogue of the finite aspect approach for vibration research. Following this, the therapy of sound and vibration keep an eye on starts, illustrated through instance structures comparable to beams, plates and double partitions. Sensor and actuator placement is defined as is the assumption of modal sensor–actuators. The layout of acceptable suggestions structures comprises attention of easy balance standards and powerful energetic structural acoustic keep watch over. optimistic place suggestions (PPF) and multimode keep watch over also are defined within the context of loudspeaker–duct and loudspeaker–microphone types. The layout of assorted elements is certain together with the analog circuit for PPF, adaptive (semi-active) Helmholtz resonators and shunt piezoelectric circuits for noise and vibration suppression. The textual content makes vast use of MATLAB® examples and those may be simulated utilizing documents to be had for obtain from the book’s website at End-of-chapter routines can help readers to assimilate the fabric as they growth during the publication. keep watch over of Noise and Structural Vibration may be of substantial curiosity to the scholar of vibration and noise regulate and in addition to educational researchers operating within the box. It’s educational gains can help practitioners who desire to replace their wisdom with self-study.

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Additional info for Control of Noise and Structural Vibration: A MATLAB®-Based Approach

Example text

J Acoust Soc Am 51(3): 946–952 11. Fahy F (1985) Sound and structural vibration/radiation, transmission and response. Academic, London 12. Qiu XJ, Sha JZ, Yang J (1995) Mechanisms of active control of noise transmission through a panel into a cavity using a point force actuator on the panel. J Sound Vib 182(1):167–170 13. Borgiotti GV (1990) The power radiated by a vibrating body in an acoustic fluid and its determination from boundary measurements. J Acoust Soc Am 88(4):1884–1893 14. Photiais DM (1990) The relationships of singular value decomposition to wave-vector by threedimensional structures.

44) After manipulation, Eq. Â/ cos. Â/ sin. , 1 C x D 1 C 12 x, so Eq. Â/ cos. Â/ sin. 46) Substituting Eq. 46) into Eq. 41) yields a simplified expression for the Rayleigh’s integral: j! o exp. Â/ cos. Â/ sin. /// dS S For simply supported beam and plate, the integral in Eq. R; Â; / D ! exp. j kR/ 2 R X Lx Ly ÁP m Ä . R; Â; / D j! X X Lx Ly ÁP mn mD1 nD1 mn 2 exp . j kR/ 2 R Ä . ˛ =m /2 1 1 Ä . Â/ cos . Â/ sin . /. 3 Sound Pressure, Power, and Radiation Efficiency 47 The sound power radiated from a source is defined as the integral, over a surface surrounding the source, of the component of the time-averaged intensity vector normal to the surface.

AIAA J 25(10):1373–1385 38. Hagood NW, Chung WH, Flotow A (1990) Modelling of piezoelectric actuator dynamics for active structural control. J Intell Mater Syst Struct 1(3):327–354 39. Dosch JJ, Inman DJ, Garcia E (1992) A self-sensing piezoelectric actuator for collocated control. J Intell Mater Syst Struct 3:166–185 40. Elliott SJ (2005) Distributed control of sound and vibration. Noise Control Eng J 53(5): 165–180 41. Fahy FJ, Schofield C (1980) A note on the interaction between a Helmholtz resonator and an acoustic mode of an enclosure.

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Control of Noise and Structural Vibration: A MATLAB®-Based Approach by Qibo Mao

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