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首页> 外文会议>Conference on sensors and smart structures technologies for civil, mechanical, and aerospace systems >Scavenging Vibration Energy from Seismically-isolated Bridges Using an Electromagnetic Harvester
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Scavenging Vibration Energy from Seismically-isolated Bridges Using an Electromagnetic Harvester

机译：使用电磁收集器从隔震桥梁中清除振动能量

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The increasing worldwide efforts in securing renewable energy sources increase incentive for civil engineers to investigate whether the kinetic energy associated with the vibration of larger-scale structures can be harvested. Such a research remains challenging and incomplete despite that hundreds of related articles have been published in the last decade. Base isolation is one of the most popular means of protecting a civil engineering structure against earthquake forces. Seismic isolation hinges on the decoupling of the structure from the shaking ground, hence protecting the structure from stress and damage during an earthquake excitation. The low stiffness isolator inserted between the structure and the ground dominates the response leading to a structural system of longer vibration period. As a consequence of this period shift, the spectral acceleration is reduced, but higher response displacements are produced. To mitigate this side effect, usually isolators are combined with the use of additional energy dissipation. In this study, the feasibility of scavenging the need-to-be dissipated energy from the isolator installed in a seismically isolated bridge using an electromagnetic (EM) energy harvester is investigated. The EM energy harvester consists of an energy harvesting circuit and a capacitor for energy storage. A mathematical model for this proposed EM energy harvester is developed and implemented on an idealized base-isolated single-degree-of-freedom system. The effect of having this EM energy harvester on the performance of this seismic isolated system is analyzed and discussed. The potential of installing such an EM energy harvester on a seismically isolated bridge is also addressed.
机译：全球范围内为确保可再生能源的安全而付出的努力越来越大，这促使土木工程师研究与大型结构的振动相关的动能是否可以被收集。尽管在过去十年中发表了数百篇相关文章，但这样的研究仍然具有挑战性和不完整性。基础隔离是保护土木工程结构免受地震影响的最流行手段之一。地震隔离取决于结构与震动地面的解耦，从而在地震激发过程中保护结构免受应力和破坏。插入结构和地面之间的低刚度隔离器主导了响应，从而导致结构系统的振动周期更长。由于此周期偏移，频谱加速度会降低，但会产生更高的响应位移。为了减轻这种副作用，通常将隔离器与额外的能量耗散结合使用。在这项研究中，研究了使用电磁（EM）能量收集器从安装在地震隔离桥梁中的隔离器中清除需要消散的能量的可行性。 EM能量收集器由能量收集电路和用于存储能量的电容器组成。在理想的基础隔离单自由度系统上开发并实现了针对此提议的EM能量收集器的数学模型。分析并讨论了使用这种EM能量收集器对这种地震隔离系统的性能的影响。还探讨了在地震隔离的桥梁上安装此类EM能量收集器的潜力。

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