Abstract
Attenuation and isolation are typical means to cope with the environmental vibration. In this research, we consider a kind of truss structural system which is expected to possess both of the capabilities. Vibration attenuation is achieved by utilizing the shape memory alloy (SMA) wires characterized by its hysteretic loop of the pseudo-elasticity in relatively high temperature condition. Vibration isolation is realized based on relatively low stiffness of the wire members as well as the hanging configuration of the truss structural system itself; that is, the truss structural system in hanging configuration is able to demonstrate the property of the pendulum. In the current study, we deal with a hanging truss structural system having SMA and ordinary wire members. Both types of wire members have different mechanical characteristics; by combining these two types of wires, the attenuation and isolation capabilities and the stability of the hanging truss against the environmental vibration can be simultaneously achieved. We examine the abilities of this truss structural system through the calculations of the dynamic equations. In order to tackle nonlinearity of such kind of dynamic problems, a time integration method coupled with nonlinear iterative method is introduced. A combinatorial optimization problem is formulated and is solved by multi-objective genetic algorithm. Optimal configurations of the truss structures and the corresponding dynamic behaviors are discussed.
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Zhang, X., Hanahara, K., Tada, Y. (2018). Dynamic Behavior of Hanging Truss Having Shape Memory Alloys (From the Optimization Viewpoint of Vibration Isolation and Attenuation). In: Schumacher, A., Vietor, T., Fiebig, S., Bletzinger, KU., Maute, K. (eds) Advances in Structural and Multidisciplinary Optimization. WCSMO 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-67988-4_96
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DOI: https://doi.org/10.1007/978-3-319-67988-4_96
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