Seismic Design Response with Gyroscopic and Dynamic Inter- action Effects of Active Secondary Systems in Structures

该赠款是一项单边行动，由结构系统项目的剩余资金提供资金。所要求金额的余额将在90财年给出。本项目研究旋转机械，如电机、发电机、水泵和涡轮机在地震荷载作用下的动态响应。这些机器的正常运行对工业设施的安全运行至关重要。由于陀螺效应的存在和其轴承的特殊特性，这些机器的地震诱发地面激励分析是一个非常具有挑战性的分析问题。由于机床及其支撑结构和其他附件（如管道）之间的动态相互作用，进一步增加了问题的复杂性。将使用响应谱方法来计算这些系统的设计响应，明确地包括系统和地面运动的特殊特性。该研究将有助于合理确定旋转机械的设计响应和机械基础结构中的设计力。在实践中，它将有助于旋转机械的设计者评估这些系统的性能，并防止这些系统在强震中发生故障。

This grant is a unilateral action and is being funded with the remaining funds from the Structural Systems program. The balance of the requested amount will be given in FY 90. This project studies the dynamic response of rotating machines such as motors, generators, pumps, and turbines subjected to seismic loads. The proper functioning of such machines is critical for the safety operation of an industrial facility. Because of the presence of gyroscopic effects and special characteristics of their bearings, the analysis of these machines for earthquake induced ground excitation is a very challenging analytical problem. The complexity of the problem is further increased by the dynamic interaction between the machine and its support structure and other attachments such as piping. A response spectrum approach will be used to calculate the design response of these systems, explicitly including the special characteristics of the system and ground motion. This study will lead to the development of rational determination of design responses of rotating machines and the design forces in the structures of machine foundations. In practice, it will help the designers of rotating machines to evaluate the performance and prevent the malfunction of these systems during a strong ground shaking.