Committee to Oversee the Design and Performance of an Earthquake Simulator for the National Geotechnical Centrifuge in Davis, CA

监督加利福尼亚州戴维斯国家岩土工程离心机地震模拟器的设计和性能委员会

• 批准号: 9215039
• 负责人: Ronald Scott
• 金额: $ 3.99万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-15 至 1995-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215039&HistoricalAwards=false
• 关键词: Committee; Oversee; Design; Performance; Earthquake

The University of California at Davis is in the process of designing an earthquake simulator for their National Geotechnical Centrifuge (NGC). The purpose of this award is to support a three-person committee to oversee the design of this simulator. The committee members consist of a geotechnical engineer having expertise in the design, installation and operation of an earthquake simulator having the same operational principle as the one being designed; a structural engineer with expertise in the dynamics of structures, especially with respect to statistical aspects of the analysis and performance; and a mechanical engineer experienced in the design and analysis of rotating devices, including motors and drive systems. The oversight involves technical studies and selected experiments, some of which are performed by the committee, and some by the University of California at Davis. The goals of this committee are to: (a) Examine the operational conditions and capabilities of the NGC through calculations of the modal shapes and frequencies of the entire system; as well as through selected experiments using the instrumented centrifuge; (b) Assess the capabilities of the proposed earthquake simulator, acting alone; (c) Examine through experiment and numerical simulations the interaction of the mounted simulator with the other centrifuge components; (d) Integrate the above results to assess the expected shaking performance of the system with the centrifuge rotating, the repeatability and reliability of the motions generated, the safety of the facility, and the effect of the operation of the shaking system on the fatigue life of the centrifuge.

加州大学戴维斯分校正在为其国家岩土离心机 (NGC) 设计地震模拟器。 该奖项的目的是支持一个三人委员会来监督该模拟器的设计。 委员会成员包括一名岩土工程师，具有地震模拟器设计、安装和操作方面的专业知识，其操作原理与正在设计的地震模拟器相同；具有结构动力学专业知识的结构工程师，特别是在分析和性能的统计方面；以及一名在旋转设备（包括电机和驱动系统）设计和分析方面经验丰富的机械工程师。 监督涉及技术研究和选定的实验，其中一些由委员会进行，一些由加州大学戴维斯分校进行。 该委员会的目标是： (a) 通过计算整个系统的模态振型和频率来检查 NGC 的运行条件和能力；以及通过使用仪器离心机进行的选定实验； (b) 评估拟议的地震模拟器单独运行的能力； (c) 通过实验和数值模拟检查安装的模拟器与其他离心机部件的相互作用； (d) 综合上述结果来评估系统在离心机旋转时的预期振动性能、产生的运动的重复性和可靠性、设施的安全性以及振动系统的运行对疲劳寿命的影响离心机的。