循环对称接触结构的概率有限元应力分析
AEROENGINE LIFE MONITORING AND REAL-TIME DATA PROCESSING
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摘要: 给出了循环对称接触表面上相应节点的循环对称接触关系及其关于随机变量的导数表达式,建立了考虑材料物性和载荷随机性的循环对称接触结构基本段概率有限元应力分析法。还给出了采用一次二阶矩Hasofer-Lind方法的相应结构强度可靠性分析公式。Abstract: Aeroengine load and life monitoring technology play very important role in monitoring and assessing operating conditions,life consumption and remaining life of aeroengine.Aeroengine load can improve the safety and reliablity of an engine in high performance operation,and reduce its direct operation cost.The on-board life monitoring system requires the real-time analysis method of flight data processing and life consumption evaluation.Three point method,shortest sail-route method and rain-flow method are used to conduct real-time data condensing processing,including peak valley values inspection,uneffective magnitude value detecting and LCF counting for each flight.The information obtained by the on-board life monitoring system is very useful for life track on the data base of the engine parts.
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Key words:
- Aircraft engines /
- Afterburners /
- Transient process /
- Control problems
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