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

加州大学戴维斯分校位于 设计地震模拟器的过程 因为他们的国家地质学证书 （NGC）. 该奖项的目的是 支持一个三人委员会来监督 这个模拟器的设计。 委员会成员包括 岩土工程师具有专业知识， 设计、安装和操作 具有该地震模拟器的地震模拟器 作为一个存在的操作原则 设计;具有专业知识的结构工程师 在结构动力学中，特别是 关于分析的统计方面， 性能;和机械工程师 设计和分析经验丰富， 旋转装置，包括电动机和驱动装置 系统. 监督涉及技术 研究和选定的实验，一些 由委员会执行， 其中一些是由位于戴维斯的加州大学提供的。 该委员会的目标是： (a)检查操作条件， NGC的计算能力， 模态振型和频率 系统;以及通过选定的实验 使用仪器化离心机; (b)评估拟议的 地震模拟器，单独行动; (c)通过实验和数值检验 模拟安装的 模拟器与另一台离心机 部件; (d)综合上述结果， 系统的预期振动性能 随着离心机的旋转， 和所产生的运动的可靠性， 设施的安全，以及 振动系统的操作对疲劳 离心机的寿命。

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.