Research Initiation: Random Vibration of Parametrically Excited Structural Systems

研究启动：参数激励结构系统的随机振动

• 批准号: 8504972
• 负责人: George Tsiatas
• 金额: --
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-07-01 至 1988-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8504972&HistoricalAwards=false
• 关键词: Research; Initiation; Random; Vibration; Parametrically

The objectives of this project are: to develop reliable schemes for the truncation of the differential equations governing the moments of general systems under nonwhite parametric excitation; to develop appropriate filters for the case of nonwhite excitation; to use the above results to study the response of simple nonlinear and hysteretic structures under nonwhite parametric loads; and to study the response of complex nonlinear systems under nonstationary, nonwhite parametric excitation due to earthquakes, wind and wave forces. Simple structures such as beams will be examined first, and then the methods will be applied to complex systems such as bridges and offshore platforms. This research will result in a much better understanding of the behavior of nonlinear structures subjected to random parametric excitations. The systems will be modeled realistically as nonlinear or hysteretic, whereas the loads will be nonstationary nonwhite processes.

本项目的目标是：发展非白参数激励下一般系统的矩微分方程的可靠截断格式，发展非白激励下的适当滤波器，利用上述结果研究简单非线性和滞回结构在非白参数载荷下的响应，并在此基础上建立非线性和滞回结构的动力学模型。研究复杂非线性系统在非平稳、非白参数激励下的地震、风力和波浪力的响应。首先将检查梁等简单结构，然后将这些方法应用于桥梁和海上平台等复杂系统。这一研究将有助于更好地理解非线性结构在随机参数激励下的行为。该系统将被建模为现实的非线性或滞后，而负载将是非平稳非白过程。