Study on Characteristic Optimization of Shearing Viscoelastic Damp

Abstract:

This paper studies characteristics optimization of shearing viscoelastic damp of the SDOF system. Theoretical analysis included geometry and nechenical property of viscoelastic material and characteristics of connecting bars. Studies indicate varied thickness,shearing area and plies of viscoelastic material cause changes in modulus of shearing storage mudulus and shearing loss modulus and next experimetns shows effect of destortion, exciting frequncy and repeated cycles. The stiffness of connecting bar effect the effeciency of damp and the internal force of the structure, so the selection of connecting bar is very important in characteristic optimization. Contrast by the no simplified model and the simplified model indicated stronger connecting bars effect the inner force of the whole frame more notably, so the negative effect should be considered when using the simplified model. A procedure to find the optimal characteristics of shearing viscoelastic damp for SDOF system is proposed then. This procedure targets maximum damp ratio and minimum section of connecting bar. A predefined damp ratio excite the procedure and every step set an increment in damp ratio simultaneously stiffness of the connecting bar is computed. The procedure repeated until the damp ratio approaches an ideal value and the stiffness declined to a relative lower point then. All the characteristics can be determined according to the damp ratio and manufacture conditions at last. And an exanded procedure used in n-DOF system including both optimization of characteristcs and arrangement is expected in the end.

• Periodical: Applied Mechanics and Materials (Volumes 744-746)
• Pages: 1499-1506
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.744-746.1499
• Online since: March 2015
• Authors: Chun Xia Zhang*, Tao Lan, Yu Wang
• Keywords: Characteristic Optimization, Connecting Bars, Damp Ratio, Shearing Viscoelastic Damp

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DOI: 10.1007/s11803-012-0130-4