Abstract
An adaptive truss is a truss structural system equipped with functional truss members, such as length-adjustable members, shape memory alloy (SMA) members, spring-dashpot members, and so on. This is a representative example of so-called adaptive structure. In this study, we deal with the dynamic simulation of various types of adaptive trusses. The geometrical relation is given in a universal form applicable to all planar and spatial trusses. We develop descriptions of dynamic behavior of various types of functional truss members and give a general form of the descriptions. The equation of motion is formulated based on the geometrical relation and the description of member characteristics. Dynamics simulation procedure based on the Newmark Beta method is also developed. Dynamic behaviors of several types of adaptive trusses are simulated. The feasibility of the proposed dynamics calculation is confirmed; some characteristic dynamic behaviors of adaptive trusses are demonstrated.
Highlights
An adaptive truss is a truss structural system equipped with a number of functional truss members, such as lengthadjustable members, shape memory alloy (SMA) members, spring-dashpot members, and so on
We develop descriptions of dynamic behavior of various types of functional truss members and give a general form of the descriptions
We have dealt with the dynamic simulation of adaptive truss consisting of truss members of different mechanical properties
Summary
An adaptive truss is a truss structural system equipped with a number of functional truss members, such as lengthadjustable members, shape memory alloy (SMA) members, spring-dashpot members, and so on. It is a typical example of so-called adaptive structure, which is a structural system that has the ability to exhibit geometrical or mechanical adaptability (Wada et al, 1990). Adjusting its actuated truss member lengths, it can change its geometry as well as its mechanical characteristics. Seguchi et al (1990) have reported dynamic simulation of truss-type robot arm consisting of ordinary rigid length-adjustable truss members. The feasibility of the proposed dynamics calculation is confirmed; influence of the mechanical characteristics of truss members on the dynamic behavior of the adaptive truss system are demonstrated
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