摘要
本文首先给出了管道在流体作用下的力学模型 ,并对风力作用下管道产生涡激振动的机理进行了分析 ,从而建立了管桥在风力作用下的力学模型和相应的振动微分方程 ,同时给出了管桥的固有特性和动力响应分析结果。然后 ,在此基础上 ,提出了首超模糊失效、模糊疲劳失效和混合失效等三类模糊失效准则 ,并依据这些准则分别给出了动力可靠性的计算公式。最后 ,给出了具体的算例。
This paper first provides mechanic model of pipeline with fluid, and the mechanism of pipeline vortex-induced vibration under wind is analyzed. The mechanic model of pipeline bridge under wind and corresponding vibration differential equation are founded. At the same time the inherent properties and the results of dynamic response are generated. Then the rule of fuzzy failure of the first excess over allowed value, the rule of fuzzy failure of fatigue and the rule of mixed failure are provided. From these rules, corresponding computation formulas of fuzzy dynamic reliability are given respectively. Finally,an application example is given.
出处
《地震工程与工程振动》
CSCD
北大核心
2002年第5期36-40,共5页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金资助项目 ( 5 99790 18)
