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Legacy software from 1980 to to perform static or dynamic analysis of an electric transmission line system when one or more wires suddenly break. Source code in FORTRAN and related reports can be downloaded from the earthquake engineering online archive maintained by University of California Berkeley.
BROKE: Dynamic Analysis of Electric Transmission Line Systems with Broken Wires
Fleming, John F.; Siddiqui, Faruq M. A.
Department of Civil Engineering, University of Pittsburgh, Pittsburgh, PA, 1980,
This program may be used to perform static or dynamic analysis of an electric transmission line system when one or more wires suddenly break. In the static analysis the displacements, the wire tensions, and the forces at the wire attachment points and the ground line moments are computed for the broken wire equilibrium position for each support structure. In the dynamic analysis the variation with time of the same quantities are computed and the maximum values and their time of occurrence, along with corresponding impact factors, are given. The analysis is performed for a mathematical model of the line system consisting of the individual structural elements which are: the wires; the suspension insulators; and the support structures, which are usually called towers. The static analysis uses the Stiffness Method of analysis in which the displacements at discrete points in the mathematical model are computed by solving a set of equilibrium equations obtained by summing external applied loads and internal resisting forces at each of the points. For the dynamic analysis a numerical integration approach is used to solve the dynamic equations of motion for a lumped mass mathematical model. The user can choose between two different numerical integration procedures.
Available online: http://nisee.berkeley.edu/documents/SWSC/BROKE.zip (46 KB)