Author: Watson, V;Hirst, M J S
First published: N/A
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Watson, V;Hirst, M J S
Mr. Victor L. Gill (F): I would like to express my great admiration for the sheer magnitude of the work which Professor Leonhardt and Dr. Schlaich have undertaken and also the meticulous attention to detail and the engineering skill with which it has been accomplished. Briefly, there are one or two small points which I would like to make. First of all, what account has been taken of creep and relaxation in the cables? The emphasis on dimensional accuracy makes me wonder whether this may pose a problem. This is also coupled with the stress limits in the cables, but perhaps you would be good enough to comment on that point.
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Finding the exact solution of boundary and eigenvalue problems in the case where the boundary configuration is not natural to one of the common co-ordinate systems for which the governing partial differential equation can be solved by the standard method of separation of variables is, in general, out of the question. Approximate methods such as finite differences, finite elements, collocation, etc. must be used. It has been shown by several authors that the conformal mapping technique provides a suitable approach for analysing bending, buckling and vibration problems of thin elastic plates.