Control of Noise and Structural Vibration: A MATLAB®-Based - download pdf or read online

By Qibo Mao

Control of Noise and Structural Vibration offers a MATLAB®-based method of fixing the issues of bad noise new release and transmission by means of buildings and of bad vibration inside buildings in keeping with 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 strategy for vibration research. Following this, the therapy of sound and vibration keep an eye on starts off, illustrated through instance platforms similar to beams, plates and double partitions. Sensor and actuator placement is defined as is the belief of modal sensor–actuators. The layout of applicable suggestions platforms contains attention of uncomplicated balance standards and powerful lively structural acoustic keep an eye on. confident place suggestions (PPF) and multimode keep an eye on also are defined within the context of loudspeaker–duct and loudspeaker–microphone types. The layout of varied parts is distinct 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 broad use of MATLAB® examples and those might be simulated utilizing records on hand for obtain from the book’s web site at End-of-chapter workouts might help readers to assimilate the cloth as they growth in the course of the booklet. keep an eye on of Noise and Structural Vibration should be of substantial curiosity to the coed of vibration and noise regulate and likewise to educational researchers operating within the box. It’s instructional beneficial properties may help practitioners who desire to replace their wisdom with self-study.

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7 An Introduction of MATLAB and Simulink MATLAB® is a high-performance language for technical computing. It integrates computation, visualization, and programming in an easy-to-use environment where problems and solutions are expressed in familiar mathematical notation. Use the MATLAB Editor to write program in the MATLAB language and save them for future use. The editor saves your files with the m extension, which is where the name of M-file originates. There are two kinds of M-files: scripts, which do not accept input arguments or return output arguments and operate on data in the workspace, and functions, which can accept input arguments and return output arguments.

Mao Q, Pietrzko S (2005) Control of sound transmission through double wall partitions using optimally tuned Helmholtz resonators. Acta Acust United Acust 91:723–731 44. Bedout JM, Franchek MA, Bernard RJ, Mongeau L (1997) Adaptive-passive noise control with self-tuning resonators. J Sound Vib 202:109–123 45. Esteve SJ, Johnson ME (2004). Development of an adaptive Helmholtz resonator for broadband noise control. In: Proceedings of IMECE2004, Anaheim, CA, USA 46. Nagaya K, Hano Y, Suda A (2001) Silencer consisting of two-stage Helmholtz resonator with auto-tuning control.

26) where Ámn is the modal amplitude of the (m, n)th mode of the plate and Mmn is the modal mass. Substituting Eq. 25) into Eq. 27) where ! mn is the (m, n)th natural frequency. The structural mode shape functions can be arbitrarily chosen as long as they are quasi-orthogonal and both of them satisfy the boundary conditions. 28) The shape functions Xm (x) and Yn (y) can be arbitrarily chosen if and only if they are quasi-orthogonal and satisfy the boundary conditions. 2 The Structural Modes for Plates 37 From Eq.

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