DOI: https://doi.org/10.1115/detc1995-0250Mar 5, 2021Proceedings Paper

Gravitational Effects on Two Link. Flexible Multibody Systems

Gloria J. Wiens, David W. Smart

Abstract

Few flexible multibody studies have been conducted in which gravity is included in the analysis and of these, none include the axial component of the gravitational loading. However, as multibody systems become increasingly more flexible, the axial loads induced by gravity are playing an increasingly more important role in the elastic characteristics of multibody systems, especially in the ground testing of those for space applications. In an effort to minimize the unreliable aspects in ground testing, the research presented here provides a relatively simple theoretical model based on the quasi-dynamics of two link multibody systems with an arbitrary orientation within the gravitational field. The theoretical model has shown gravity does play a significant role in predicting accurate first and second frequencies and the static deflections of such systems. Experimental verification of the theoretical results is presented.

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