Engineering Research Equipment Grant: Dynamic Signal Analyzer

这份增刊是对美国国家科学基金会倡议“残疾科学家和工程师促进奖”的回应。这些设备包括特殊的访问桌，用于存放早期设备赠款提供的设备，以及解决PI手指灵巧困难的Vax图形平板电脑。补充的设备项目为实验研究结构的非线性振荡行为提供了设备。该设备是一个动态信号分析仪，从进行振动测试的物理结构中收集数据。非线性振荡在过去得到了广泛的研究。这些研究集中于长期时间反应，即在瞬态衰减后很长时间内表现出的行为。这个项目研究了在瞬态衰减过程中运动是如何演变的。有两个项目得益于该设备的使用。第一种方法着重于悬臂梁的振动。对于某些类型的干扰，已经提出了潜在的危险振动的理论主张。本项目将试图证实这些说法。第二个项目与旋转系统有关，其中也提出了严重非线性行为的理论主张。这些主张将通过实验加以调查。

This supplement is responsive to the NSF initiative "Facilitation Awards for Handicapped Scientists and Engineers". The equipment comprises special access desks to house equipment provided by an earlier equipment grant, and a Vax Graphic tablet to address the PI's finger dexterity difficulties. The equipment project being supplemented provides equipment to experimentally investigate the nonlinear oscillatory behavior of structures. The equipment, a dynamic signal analyzer, collects data from physical structures undergoing vibration tests. Nonlinear oscillations have been studied extensively in the past. These studies have focused on long term time response, the behavior exhibited long after transients have decayed. This project investigates how the motion evolves during the decay of the transients. Two projects benefit from the use of the equipment. The first focuses on the vibration of a cantilevered beam. Theoretical claims have been made for the potential of dangerous vibrations for certain types of disturbances. This project will attempt to substantiate these claims. A second project is concerned with rotating systems where theoretical claims have also been made for serious nonlinear behavior. These claims will be investigated through experimentation.