Japan STA Program: Structural Dynamics and Vibration Reduction of Long-Span Bridges

9418777李该奖项支持麻省理工学院海洋工程系李力博士在日本筑波公共工程研究所工作，为期12个月的日本科学技术振兴机构博士后奖学金。李博士将与结构部门的Hiroshi Sato博士合作进行一个名为“日本STA计划：大跨度桥梁的结构动力学和减振”的研究项目。通过实验和分析相结合的方法，李博士和佐藤博士将开发一种方法和设备，以减少大风中超长跨度桥梁的振动。在超长跨度桥梁的使用寿命中，它经常受到风的作用，主要以扭转和弯曲的形式振动。横流振动和直线波动阻力往往接近固有频率，导致较大的动力响应和桥梁破坏。利用李开发的边界减振器，该团队将开发一个超长跨度桥梁系统的结构模型，以预测动力响应。他们将使用佐藤博士的实验室大跨度桥梁模型来验证理论模型和预测。* * *

9418777 Li This award supports a 12-month Science and Technology Agency of Japan Postdoctoral Fellowship for Dr. Li Li, Department of Ocean Engineering, Massachusetts Institute of Technology, at the Public Works Research Institute, Tsukuba, Japan. Dr. Li will work with Dr. Hiroshi Sato of the Structure Division on a research project entitled, "Japan STA Program: Structural Dynamics and Vibration Reduction of Long-Span Bridges." Through a combined experimental and analytical approach, Dr. Li and Dr. Sato will develop a method and apparatus for reducing the vibration of super-long-span bridges in high winds. During its lifespan, a super-long-span bridge is constantly subjected to winds and vibrates primarily in its torsional and bending modes. Cross-flow vibration and in- line fluctuating drag force are often close to natural frequency, resulting in large dynamic responses and bridge failure. Utilizing a boundary vibration absorber developed by Li, the team will develop a structural model for a super- long-span bridge system to predict dynamic responses. They will use Dr. Sato s laboratory model of a long-span bridge to validate the theoretical model and predictions. ***