The Distributed Mass-Stiffness Technique for the Dynamical Analysis of Complex Frameworks

The paper describes a method for the dynamic analysis of complex frameworks assuming a distributed mass-stifiness criterion. When compared with the lumped mass-stiffness technique, the proposed method is more accurate for the detcrmination of the response and natural frequencies of such frameworks. Moreover, the lumped mass technique discusses only a limited number of vibration modes, depending on the number of lumped masses assumed by the idealized system. The proposed method, however, trcats the
framework as an infinite degrees of freedom system and thus will discuss all its possible modes of vibration. The method is also compared with the 'Duncan receptance technique' showing its superiority especially when dealing with highly redundant complex frameworks.

M.E. Mohsin and E.A. Sadek