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首页> 外文会议>AHS 59th Annual Forum Proceedings Vol.1 May 6-8, 2003 Phoenix, Arizona >SAFETY FACTORS AND RISK IN USAGE MONITORING AND FATIGUE SUBSTANTIATION OF HELICOPTER COMPONENTS
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SAFETY FACTORS AND RISK IN USAGE MONITORING AND FATIGUE SUBSTANTIATION OF HELICOPTER COMPONENTS

机译：直升机部件的使用情况监测和疲劳成因方面的安全因素和风险

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摘要

A study has been made of the errors and variability in the fatigue substantiation process, and of the variation in manoeuvre loads and usage during normal operation of a UK military helicopter. Both S-N curve behaviour and service loading have been investigated. Three components were studied. One was a location on the lift frame, the others were a main rotor blade linkage and a rotor pitch change link. Service loads were measured using strain gauged components and a data recording system. Usage was monitored by manual identification and recording of manoeuvres throughout the helicopter flight. It was found that usage variability is very great, with coefficients of variation in excess of 100% for the majority of manoeuvres. It was found that usage measured in service was significantly more benign for all types of mission, than that assumed in design. Mechanical test results showed significant errors in damage accumulation and mean stress models for life prediction. Monte Carlo simulations demonstrate that calculated probability of failure is dominated by material and modelling errors; usage and manoeuvre load variability playing a minor role.
机译：已经对疲劳证实过程中的误差和变异性以及英国军用直升机正常运行期间机动负荷和使用方式的变化进行了研究。已经研究了S-N曲线行为和服务负载。研究了三个组成部分。一个是在举升架上的位置，其他是主旋翼桨叶连杆机构和转子变距连杆。使用应变计组件和数据记录系统测量服务负载。通过手动识别和记录整个直升机飞行中的演习来监视使用情况。发现使用的可变性非常大，大多数动作的变化系数超过100％。发现在服务中测量的使用情况对所有类型的任务都比设计中假设的要好得多。机械测试结果表明，在损伤累积和平均应力模型的寿命预测方面存在重大误差。蒙特卡洛模拟表明，计算出的失效概率主要由材料和建模误差决定；使用和机动负载的可变性起着较小的作用。

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