Washington, District of Columbia
June 23, 1996
June 23, 1996
June 26, 1996
1.126.1 - 1.126.8
Coupling Simulation and Experiment in Noise and Vibration Engineering
Timothy Cameron, Daniel Russell GMI Engineering & Management Institute
Abstract Computer simulation and experimental testing play major roles in noise and vibration engi- neering. Modal analysis of structures, for instance, is regularly performed experimentally and with finite element analysis. Often the integration of simulations and experiments consists of nothing more than adjusting a fudge factor, like a material property, to get simulations to agree with test results. However, the current emphasis in industry and research laboratories is to more tightly couple test- ing and simulation-using test results to validate simulation models and simulation results to design experiments. For example, finite element analysis is used to identify how best to support and excite a structure to produce a particular vibration, and modal test results are used to establish “modal assurance criteria” on finite element simulations.
This paper presents two laboratory exerciscs that demonstrate the importance of coupling computer simulations with experiments for mutual validation. The exercises from a new course in “Acoustics, Noise and Vibration” at GMI Engineering & Management Institute also introduce students to tools and practices used extensively in noise and vibration engineering. The other six experiments in the course, like most undergraduate laboratory experiments, focus on demonstrating physical principles. These two exercises focus on the tools and methods employed in noise and vibration engineering. The first exercise comes near the beginning of the course and deals with the frequency domain analysis of signals using fast Fourier transforms (FFTs). The second exercise, near the-end of the course, deals with structural modal analysis.
Introduction Strong demand from students and their employers prompted the recent development of a new concentration in Acoustics, Noise and Vibration at GMI Engineering & Management Institute. Two courses in acoustics and vibration have been created and three more are planned as a cooperative effort between Mechanical Engineering and Applied Physics. The instructional laboratory used in the courses has been made possible with grants from the National Science Foundation and industry.
Eight laboratory exercises have been developed for the senior-level course “Acoustics, Noise and Vibration” to introduce students to the theory and application of important concepts in sound and vibration. These exercises introduce students to the concepts and equipment involved with sound radiation, frequency analysis, sound pressure and intensity measurements, sound absorption, room acoustics and reverberation time, acoustic filters and mufflers, and structural vibration. In another l paper we describe the objective and learning outcome expected of each exercise, and how the sequence
Cameron, T., & Russell, D. W. (1996, June), Coupling Simulation And Experiment In Noise And Vibration Engineering Paper presented at 1996 Annual Conference, Washington, District of Columbia. 10.18260/1-2--5945
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