ISSN:
1741-2765
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract In order to ensure a valid damping measurement based on a proposed mathematical model, various laboratory techniques may be employed which require relatively simple instrumentation from which cross correlation of the data may be obtained. Measurements were made (utilizing an accelerometer, strain gages, and a sound-level meter) under forced (3-dB frequency band or amplification factor Q) and free-vibration conditions at the fundamental and higher axial modes. Analysis (based on the viscous and complex-moduli theories) of the material damping of an aluminum alloy 2024-T4 in longitudinal vibrations shows good cross correlation between theories and experimental methods. These methods were extended to damping measurements of yellow brass and commercial steel. A multiple regression analysis was employed in the damping data reduction and was found to be useful in eliminating the data scatter. A sound-level meter was used as a noncontacting test method which proved useful even though its use does have drawbacks.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02318875
Permalink