Redesign of Structural Vibration Modes by Finite Element Inverse Perturbation.

摘要

It has been demonstrated that it is feasible to apply the inverse perturbation method, originally developed at United Technologies Research Center, directly to the output of a finite element computer analysis of a structure. Thus, a new structural design tool has been developed which has the potential for application to the mathematically complex structure of a turbine blade. The initial step in this direction, as described herein, was the redesign of a flat plate and a 45 degree arc of a cylindrical shell, both mounted as cantilever beams. Included in the report, in addition to a detailed review of the contract work, is an overview of the concept of inverse perturbation, and a detailed description of previous UTRC work on redesigning structural vibration modes by inverse perturbation subject to minimal change theory, which set the stage for the present investigations.