POWER FLOW IN TWO- AND THREE-DIMENSIONAL FRAME STRUCTURES

摘要

A general matrix method is presented for the analysis of power flow in two- and three-dimensional frames using a wave scattering approach. Axial, torsional, and flexural wave modes are included. Since the method is intended to be used for mid- and high-frequency analysis, shear deformation and rotatory inertia are included in the flexural wave modes. A general formulation is presented to determine wave scattering at structural junctions and boundaries. Although the finite element method can be used to calculate power flow, a large number of elements is required at mid and high frequencies to obtain accurate results. In the current method, exact wave mode expressions are used and therefore only one ''element'' is required for each structural member at any frequency. Power flow results using the wave scattering approach are compared to the conventional finite element method for two- and three-dimensional frames. (C) 1995 Academic Press Limited. [References: 13]