Preliminary Noise Control Guidelines for the Design of High-Speed Machinery

    Volume 8, Issue 3 (September 1986)

    ISSN: 0884-6804

    CODEN: CTROAD

    Page Count: 8


    Thompson, BS
    Graduate student and professor, Michigan State University, East Lansing, MI

    Sharif-Bakhtiar, M
    Graduate student and professor, Michigan State University, East Lansing, MI

    Abstract

    Government regulations limiting the acoustical noise radiation from machinery have further complicated the already complex design process associated with successfully synthesizing high-speed mechanism systems. This is because few design guidelines exist for noise control purposes. This experimental comparative study demonstrates how the surface accelerations of the links of a four-bar linkage and the level of acoustical radiation from the mechanism may be reduced by fabricating the members from composite materials possessing both high values of material damping and also large stiffness-to-weight ratios. This is the first design guideline. The investigation is based on a four-bar linkage with clearance in the coupler-rocker joint, and the apparatus accommodates flexible link specimens of different materials. Experimental results are presented for the dynamic deflections of the flexible links and also the impactive excitation at the coupler-rocker joint. The second design guideline distilled from the study is that the noise radiation from a machine may be qualitatively evaluated by performing an elastodynamic simulation of the mechanism, rather than undertaking a complex coupled acoustoelastodynamic analysis of the complete mechanical-fluid system.


    Paper ID: CTR10327J

    DOI: 10.1520/CTR10327J

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    Author
    Title Preliminary Noise Control Guidelines for the Design of High-Speed Machinery
    Symposium , 0000-00-00
    Committee D30