Multistable Cosine-Curved Dome System for Elastic Energy Dissipation
Multistable Cosine-Curved Dome System for Elastic Energy Dissipation
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DOI：
10.1115/1.4043792
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
Mansour Alturki;R. Burgueño
中科院分区：
文献类型：
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作者：
Mansour Alturki;R. Burgueño
本文提出了一种由多稳态余弦曲穹顶（CCD）串联组成的新型消能减震体系。该系统表现出多个连续的快速通过和快速返回屈曲行为与滞后响应。CCD的响应在弹性范围内，因此系统的原始配置完全可恢复。通过数值模拟和实验测试，研究了系统中CCD单元的几何特性及其数量对系统力-位移和能量耗散特性的影响。有限元分析（FEA）进行模拟系统的响应，开发一个多线性分析模型的滞后响应，考虑系统的非线性行为。利用该模型对该体系的耗能特性进行了研究。对3D打印样本进行了实验测试，以分析系统并验证数值结果。结果表明，能量耗散主要取决于CCD单元的数量和顶点高厚比。开发的多线性分析模型产生保守而准确的值的系统的耗散能量。所提出的系统提供了可靠的高能量耗散，单稳态（自恢复）系统的最大损耗因子值为0.14，而双稳态系统的最大损耗因子值更高。
This paper presents a new energy dissipation system composed of multistable cosine-curved domes (CCD) connected in series. The system exhibits multiple consecutive snap-through and snap-back buckling behavior with a hysteretic response. The response of the CCDs is within the elastic regime and hence the system's original configuration is fully recoverable. Numerical studies and experimental tests were conducted on the geometric properties of the individual CCD units and their number in the system to examine the force–displacement and energy dissipation characteristics. Finite element analysis (FEA) was performed to simulate the response of the system to develop a multilinear analytical model for the hysteretic response that considers the nonlinear behavior of the system. The model was used to study the energy dissipation characteristics of the system. Experimental tests on 3D printed specimens were conducted to analyze the system and validate numerical results. Results show that the energy dissipation mainly depends on the number and the apex height-to-thickness ratio of the CCD units. The developed multilinear analytical model yields conservative yet accurate values for the dissipated energy of the system. The proposed system offered reliable high energy dissipation with a maximum loss factor value of 0.14 for a monostable (self-recoverable) system and higher for a bistable system.