Magneto-Rheological Fluid Dampers for Structural Control

用于结构控制的磁流变流体阻尼器

• 批准号: 9714334
• 负责人: Faramarz Gordaninejad
• 金额: $ 24.91万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714334&HistoricalAwards=false
• 关键词: Magneto; Rheological; Fluid; Dampers; Structural

9714334 Gordaninejad Innovative energy-absorbing protective systems are needed to enhance the safety of structures in the event of earthquakes, severe storms, and other natural man-made hazards. This project aims at the developing and implementing magneto-rheological fluid (MRF) dampers for protect of structures. The focus of the research will be on the proof-of-concept utilization of a novel MRF damper for seismic protection of buildings. MFR dampers are semi-active decides that contain magneto- rhelogical fluids. Initiation of the damper's built-in magnetic field causes a fast and dramatic change in the viscosity of MRF dampers contained in the damper. The fouled changes state from liquid to semi-solid in milliseconds. The result is an infinitely variable, controllable damper capable of very large damping forces. MRF dampers offer an attractive solution to seismic energy absorption in structures because they require minimal power for operation this can be battery operated. They are inexpensive devices to manufacture, utilize, and maintain which require no mechanical, valving and have large temperature tolerance and long operational life. The focus of this project is to develop controllable MRF dampers that can demonstrate the capabilities needed for protecting buildings under strong motions. The research tasks included: (1) Comprehensive theoretical and experimental studies for basic understanding of the behavior and identification of the proposed MRF dampers, (2) Design and development of MRF dampers for building applications. Issues of robustness, maintenance, aging, and heat transfer will be investigated, and (3) Proof-of-concept laboratory tests on several scaled building systems. To maintain and improve the present performance of structures under severe seismic excitations and/or storms, new or improved technology is a clear solution. The proposed MRF damper system will take advantage of the state- of-the-art in advancement of materia l s to produce a practical, efficient, and inexpensive protective system for seismic structures. Successful completion of the research will contribute to the understanding, development and utilization of innovative protective systems in the design of new and/or retrofit of aging structures.

小行星9714334 需要创新的能量吸收保护系统来提高结构在地震、严重风暴和其他自然人为灾害中的安全性。 本计画旨在研制及应用磁流变液阻尼器于结构防护。 研究的重点将是一种新型的磁流变阻尼器的概念验证利用建筑物的抗震保护。 MFR阻尼器是含有磁流变液的半主动阻尼器。 启动阻尼器的内置磁场导致包含在阻尼器中的MRF阻尼器的粘度的快速和戏剧性的变化。 被污染的物质在几毫秒内从液体变成半固体。 其结果是一个无限可变的，可控的阻尼器能够非常大的阻尼力。 磁流变阻尼器提供了一个有吸引力的解决方案，以吸收地震能量的结构，因为他们需要最小的电力操作，这可以是电池供电。 它们是制造、使用和维护成本低廉的装置，不需要机械、阀门，并且具有大的温度耐受性和长的操作寿命。 该项目的重点是开发可控磁流变阻尼器，可以证明在强烈运动下保护建筑物所需的能力。 研究任务包括：（1）对所提出的磁流变液阻尼器的性能和识别的基本理解进行全面的理论和实验研究。（2）用于建筑应用的磁流变液阻尼器的设计和开发。 坚固性，维护，老化和传热的问题将进行调查，（3）几个规模的建筑系统的概念验证实验室测试。 为了保持和改善结构在严重地震激励和/或风暴下的现有性能，新的或改进的技术是一个明确的解决方案。 所提出的MRF阻尼器系统将利用最先进的材料来产生用于抗震结构的实用、有效和廉价的保护系统。 研究的成功完成将有助于在新的和/或老化结构的改造设计中理解，开发和利用创新的保护系统。