Accession Number:

AD0276386

Title:

AN EXPERIMENTAL INVESTIGATION OF THE DAMPING PROPERTIES OF AQUAPLAS UNDER RANDOM AND HARMONIC EXCITATION

Descriptive Note:

Corporate Author:

SOUTHAMPTON UNIV (ENGLAND)

Personal Author(s):

Report Date:

1962-03-01

Pagination or Media Count:

1.0

Abstract:

The characteristics of the commercial damping treatment Aquaplas F 102 B are found by measurements of the vibration of a two-layer plate, covered on one side with the treatment. Linearity of the dampng properties of the treatment is investigated and confirmed by a comparison of the plate vibration characteristics under both random and harmonic excitation. Consideration is then given to the reduction of bending stress in the skin of a vibrating skin-stringer configuration when Aquaplas is applied to one side of the skin. Special attention is given to the stress of the rivet line. A theoretical analysis is carried out, the effect of the treatment on the mode of vibration being fully dealt with. An experimental investigation is also described. A limited agreement between the theory and experiment is achieved. Random r.m.s. stress reductions of 70 to 90 have been measured when the Aquaplas thickness was equal to, or twice that of the skin. Linearity of the treatment properties is again demonstrated in that the random stresses can be predicted accurately from properties of the system determined from harmonic tests. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE