Method and apparatus for predicting sturctural integrity by esti

Details Method and apparatus for predicting sturctural integrity by esti Method and apparatus for predicting sturctural integrity by esti

1995-06-07

1997-07-29

Oda, Christine K.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73810, 364508, G01N 2904

Patent

active

056523866

ABSTRACT:
The integrity of structures may be determined by either one of two methods. In a first method, an impulse of energy is introduced into the structure, such as by striking the structure, and the induced vibration is measured and the modal damping factor is calculated, the modal damping factor being directly related to the integrity of the structure. In a second method, a continuous energy input is provided to the structure for inducing a continuous vibration in the structure. This continuous vibration is measured with a transducer and a modal damping factor is calculated with a computer. The computer uses an algorithm to estimate the modal damping factor of the structure by calculating a theoretical response of an idealized system from several assumed parameters and varying those parameters until the difference between the measured response of the structure and a theoretical response of the idealized system is within an acceptable margin of error.

REFERENCES:
patent: 3106838 (1963-10-01), Crooks
patent: 3153338 (1964-10-01), Kleesattel
patent: 3531982 (1970-10-01), Clotfelter et al.
patent: 3744299 (1973-07-01), Bliss
patent: 3857279 (1974-12-01), Salzer et al.
patent: 4064745 (1977-12-01), Gaddum
patent: 4542639 (1985-09-01), Cawley et al.
patent: 5210704 (1993-05-01), Husseiny
patent: 5305645 (1994-04-01), Reifsnider et al.
Structural Damping, a paper presented at a colloquium on structural damping held at the American Society of Mechanical Engineering annual meeting, pp. 1-34, Dec. 1959.
52 Calcified Tissue International 244-47, article entitled Material Damping for Monitoring of Density and Strength of Bones, by Andrew D. Dimarogonas et al., 1993.

Affiliated with

Also associated with

Rating

Method and apparatus for predicting sturctural integrity by esti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for predicting sturctural integrity by esti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for predicting sturctural integrity by esti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-634974