CAREER: Semi-Active Control with Independently Variable Stiffness and Damping Systems: Analytical and Experimental Study

职业：具有独立可变刚度和阻尼系统的半主动控制：分析和实验研究

• 批准号: 9733962
• 负责人: Satish Nagarajaiah
• 金额: $ 5万
• 依托单位: University of Missouri-Columbia
• 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: 1998-09-01 至 1999-06-04
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733962&HistoricalAwards=false
• 关键词: CAREER; Semi; Active; Control; Independently

The objective of this Career Research Project is to develop innovative semi-active structural sysems for earthquake protection, in which stiffness and damping can be varied independently, using a newly developed novel semi-active independently varible stiffness and damping device (SAIVSD). The existing semo-active variable sstiffness and damping devices for response control is limited because the stiffness and damping are either closely coupled or variation of only damping or only stiffness is possible. Research will be carried out to (1) study SAIVSD device experimentally and analytically; (2) develop control algorithms; (3) implement the device with real time control systems in scaled building models representing fixed base and base isolated buildings and bridges; and (4) evaluate the performance of the new system by shake tabletesting and numerical simulations. The comprehensive nature of this study will permit the evaluation of the capabilities of device and the advantages and disadvantages of using such devices in structural systems. Semi-active control systems have significant potential for practical implementation for earthquake protection in the near future. The research would contribute to the development of new and innovative semi-active control systems . The research will bee performed in clos collaboration with the industry which will accelerate the implementation of semi-active control system and hybrid isolation systems. The integral compnents educational compnents include (1) furher development of innovative teaching software BEST an usage in dynamics corse; (2) introduction of new advanced software into undergraduate and graduate course to enhance learning experience of students; (3) promote hands-on experimets in dynamics for effective learning; (4) development of a new earthquake engineering and structural control course ; (5) introductio if interesting concepts in dynamics to undergraduate and school students; and (6) coordinated out re arch activities including presentations at area schools and laboratory tours. The educational program is aimed at enhancing the learning experience of graduate, undergraduate, and school students.

本职业研究项目的目标是开发创新的半主动结构抗震系统，其中刚度和阻尼可以独立变化，使用新开发的新型半主动独立可变刚度和阻尼装置（SAIVSD）。 现有的用于响应控制的半主动变刚度和阻尼装置是有限的，因为刚度和阻尼或者是紧密耦合的，或者是仅阻尼或仅刚度的变化是可能的。 将进行以下研究：（1）通过实验和分析研究SAIVSD装置;（2）开发控制算法;（3）在代表固定基础和基础隔震建筑物和桥梁的比例建筑物模型中使用真实的时间控制系统实现该装置;以及（4）通过振动台试验和数值模拟评估新系统的性能。 本研究的全面性将允许评价器械的性能以及在结构系统中使用此类器械的优缺点。 在不久的将来，半主动控制系统在实际应用中具有很大的潜力。 该研究将有助于开发新的和创新的半主动控制系统。 该研究将与工业界合作进行，这将加速半主动控制系统和混合隔震系统的实施。 教育内容包括：（1）进一步开发新的教学软件BEST及其在动力学科塞中的应用;（2）在本科和研究生课程中引入新的先进软件，以增加学生的学习经验;（3）促进动力学的实践经验，以提高学习效率;（4）开发新的地震工程和结构控制课程;（5）向本科生及中学生介绍动力学中有趣的概念;及（6）协调研究活动，包括在地区学校作报告及参观实验室图尔斯。 该教育计划旨在提高研究生，本科生和在校学生的学习经验。