Reliability analysis of the machine winding for the marine canyon type pump based on the copula function

The performance degradation of machine winding was the main factor to influence the reliability of the marine canyon type pump. By analyzing the mechanism of the performance degradation of machine winding and its influence factor, this paper built the reliability analysis model through acquiring the joint density function of degradation, in response to their degradation data having two degenerate correlated variables. The results showed that the reliability without degeneration correlated variables will be lower and underestimate the real equipment reliability. This method provided a new way to solve equipment reliability with multivariate degeneration correlated variables. (authors)