Testing of structures by impact

Details Testing of structures by impact Testing of structures by impact

1984-04-02

1985-09-24

Woodiel, Donald O.

Measuring and testing

Testing by impact or shock

Specimen impactor detail

73 82, 73582, 73588, G01M 700, G01N 2904

Patent

active

045426392

ABSTRACT:
Apparatus and method for testing structures by impact. The structure is struck by an impactor associated with a force transducer the output of which is related to the force which the transducer experiences on impact and encompasses a frequency range including the lowest frequencies (typically approaching zero frequency, see FIG. 3) which that force contains to any substantial degree. A test spectrum of the force including that full range of frequencies is produced by a Fourier transformer in a form suitable for automatic comparison, and is then so compared with a reference spectrum typical of impact with a reference structure, and a signal is produced indicating fit or lack of fit between the test and reference spectra.

REFERENCES:
patent: 4470293 (1984-09-01), Redman
patent: 4479386 (1984-10-01), Beggs et al.

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