摘要
在考虑了工程结构承受疲劳载荷的各态历经性的基础上，结合了结构元件寿命随机分布形式和Ｍｉｎｅｒ线性累积损伤理论，首先对元件在疲劳载荷作用下可靠性作了分析，给出了元件在不同疲劳载荷水平下可靠性参数的估算方法，并在此基础上对结构系统的疲劳可靠性进行了研究，找出其在疲劳载荷下的主要失效模式，从而提出了一种新的评估结构疲劳可靠性的方法。该方法通过对结构在服役过程中信息的分析，以风险值来评价并监控结构在不同时间失效的危险性，以便及时加以维修，从而最终保证结构的安全。最后用算例和试验结果进行了对比分析。
Under the consideration of the similarity of fatigue load series of engineering structure the reliability of structural elements under fatigue loads is firstly analyzed and the method of evaluating elements′ reliability parameters under different fatigue load levels is given with the combination of the types of the structural elements′ life distributions and the miner linear accumulated damage theory. Furthermore, the fatigue reliability of structural systems and their main failure modes under fatigue loads are discussed. A new method of fatigue reliability evaluation of structures is presented. Risk value is used to estimate and monitor the danger while the structures lose their effectiveness in different time by analyzing the service information of the engineering structures. This method is to maintain structures in time and to guarantee the safety of them. An example is compared with the result of the experiment.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
1999年第3期293-299,共7页
Journal of Nanjing University of Aeronautics & Astronautics
基金
江苏省自然科学基金
关键词
疲劳
可靠性
线性累积损伤
失效模式
工程结构
fatigue
reliability
risk value
linear accumulated damage
P S N curve
failure mode
