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Ground shock attenuation performances of wire-rope-based meta-isolators
Highlights Wire-rope-based meta-isolators were designed and manufactured. Three measurement methods were suggested to evaluate the isolation effect. Meta-isolator suppresses structural response and further improve isolation. Vertical isolation efficiency of meta-isolation system for ground shock is better.
Abstract In this research, two types of novel meta-isolators were designed based on traditional wire-rope isolators and made by embedding mass-spring resonators into the wire-rope isolator. Measurement methods to reveal attenuation abilities of these meta-isolators were suggested through quasi-static cyclic loading tests, shaking table tests, and in-field explosion experiments. In the quasi-static tests, meta-isolators have greater hysteresis area under the same excitation displacement, which represents much greater energy consumption. Using shaking table tests and measurement, the vibration attenuation ability of the meta-isolators is improved in the designed resonant frequency, and the response amplitudes are significantly reduced compared with the conventional wire-rope isolators. Blast-induced ground shock experiments reveal that the meta-isolators indeed have an advantage over the conventional isolators in the aspect of shock resistance and the attenuation efficiency exceeds 98 %, providing a new idea and reference for protective engineering.
Ground shock attenuation performances of wire-rope-based meta-isolators
Highlights Wire-rope-based meta-isolators were designed and manufactured. Three measurement methods were suggested to evaluate the isolation effect. Meta-isolator suppresses structural response and further improve isolation. Vertical isolation efficiency of meta-isolation system for ground shock is better.
Abstract In this research, two types of novel meta-isolators were designed based on traditional wire-rope isolators and made by embedding mass-spring resonators into the wire-rope isolator. Measurement methods to reveal attenuation abilities of these meta-isolators were suggested through quasi-static cyclic loading tests, shaking table tests, and in-field explosion experiments. In the quasi-static tests, meta-isolators have greater hysteresis area under the same excitation displacement, which represents much greater energy consumption. Using shaking table tests and measurement, the vibration attenuation ability of the meta-isolators is improved in the designed resonant frequency, and the response amplitudes are significantly reduced compared with the conventional wire-rope isolators. Blast-induced ground shock experiments reveal that the meta-isolators indeed have an advantage over the conventional isolators in the aspect of shock resistance and the attenuation efficiency exceeds 98 %, providing a new idea and reference for protective engineering.
Ground shock attenuation performances of wire-rope-based meta-isolators
Liu, Yang (author) / Shi, Dongyu (author) / Li, Yu (author) / Liu, Sanfeng (author) / He, Huguang (author) / Chen, Hailong (author) / Fan, Hualin (author)
Thin-Walled Structures ; 196
2023-12-23
Article (Journal)
Electronic Resource
English
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