Forced Vibration Analysis of Frame Structures Subjected to Support Movements by the Distributed Mass Method

by Minhah Chun, St Martin's Coll, Lacey, United States,
Chu-Kia Wang, St Martin's Coll, Lacey, United States,

Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond


The dynamic response of frame structures subjected to support movements as a time varying excitation is analyzed by the distributed mass method. The continuous nature of a structure can be modeled through the differential equations of motion, which may then give an exact solution, using the distributed mass system. The forced vibration analysis is based on the free vibration modes of the structure. The free vibration modes may include the P-Δ effects and semi-rigid joints. The equation of motion is obtained from the support displacements as an excitation history, not from the support accelerations generally adopted in typical dynamic analyses.

Subject Headings: Dynamic structural analysis | Vibration | Frames | Structural analysis | Support structures | Equations of motion | Dynamic analysis | Structural dynamics

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