A New Approach to Achieve Variable Negative Stiffness by Using an Electromagnetic Asymmetric Tooth Structure
| Autor: | Wu Muyun, Liu Xueguang, Han Chao, Liang Weilong |
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| Rok vydání: | 2018 |
| Předmět: |
Article Subject
02 engineering and technology 01 natural sciences Measure (mathematics) 0203 mechanical engineering 0103 physical sciences 010301 acoustics Civil and Structural Engineering Physics Series (mathematics) business.industry Mechanical Engineering Isolator Direct current Structural engineering equipment and supplies Geotechnical Engineering and Engineering Geology Condensed Matter Physics lcsh:QC1-999 Magnetic field Nonlinear system 020303 mechanical engineering & transports Vibration isolation Mechanics of Materials business lcsh:Physics Excitation |
| Zdroj: | Shock and Vibration, Vol 2018 (2018) |
| ISSN: | 1875-9203 1070-9622 |
| Popis: | Traditional passive nonlinear isolators have been paid much attention in recent literatures due to their excellent performance compared to linear vibration isolators. However, they are incapable of dealing with varying conditions such as changing excitation frequency due to the nonadjustable negative stiffness. To solve this drawback, a new approach to achieve variable negative stiffness is proposed in this paper. The negative stiffness is realized by an electromagnetic asymmetric magnetic tooth structure and can be changed by adjusting the magnitude of the input direct current. Analytical model of the electromagnetic force is built and simulations of magnetic field are conducted to validate the negative stiffness. Then the EATS is applied to vibration isolation and an electromagnetic vibration isolator is designed. Finally, a series of tests are conducted to measure the negative stiffness experimentally and confirm the effect of the EATS in vibration isolation. |
| Databáze: | OpenAIRE |
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