关于采煤机传动系统动态可靠性和基于可靠性的灵敏度外文文献翻译、中英文翻译、外文翻译.doc

PAGE 1 PAGE 1 英文原文 Dynamic Reliability and Reliability-Based Sensitivity of Transmission System in Shearer Abstract. Transmission system in shearer, such as traction unit and cutting arm, is the essential mechanism in the mining process, which supports the whole shearer and shock vibration. Considering various uncertainties, the evolving process is established to describe the dynamic system response with uncertain factors. Considering the parametric randomness and material strength. the failure domain is regarded as the dynamic extreme value of transmission system response exceeding the threshold in operation. According to the saddlepoint approximation method, the dynamic extreme distribution is investigated to measure the safe probability and parametric sensitivity of transmission system in shearer. The dynamic reliability and reliability-based sensitivity are analysed to evaluate the evolving process of transmission system in shearer. According to the transmission model of traction unit, the influence degree of each parameter’s fluctuation can be quantified based on the indices of dynamic mean-value reliability-based sensitivity and standard deviation reliability-based sensitivity. The crude Monte Carlo simulation is taken as the benchmark to validate the reasonability. 1. Introduction Shearer equipment plays an increasingly important role in the industrial development of the mining industry. According to the hostile environment and shock vibration, system reliability guarantees the safe power transmission process and reliable structure. The maintenance information was considered to analyze the failure logic of a long-wall shearer for pin pointing the weak links [1]. Also, a case study was presented to describe the reliability and availability analysis on the subsystems of crushing plant at Jajarm Bauxite Mine [2]. The statistical approach was investigated to locate critical subsystems in order to enhance the optimum operation of the shearer machine [3]. Va