133 形状記憶合金ワイヤによる適応トラス : 動特性の基礎的検討

概要

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An adaptive truss is a truss structural system having a number of length-adjustable members. It is one of the typical examples of so-called adaptive structure. We deal with a statically indeterminate adaptive truss having shape memory alloy (SMA) wires for its length-adjustable actuators. In the current study, we discuss the dynamic characteristics of such mechanical system. A piecewise linear model taking account of the nonlinear and hysteretic characteristics of a SMA wire is introduced. The equation of motion of the adaptive truss taking account of such SMA characteristics and a numerical integration technique based on the Newmark β method are developed. We also discuss the influence of properties specific to SMA, such as the hysteretic behavior, on the dynamic characteristics of the adaptive truss.
2009-08-03