GB/T 37079-2018 in English

Technical framework of reliability assessment standards

Technical Analysis of Core Methods

1. Key Points for Implementation of Similarity Analysis

This method compares 11 types of attribute differences (including design characteristics, manufacturing process, environmental conditions, etc.) between newly developed equipment and in-service equipment, and uses a weighted algorithm to quantify the similarity:

2. Physical model of durability analysis

The evaluation process based on failure physics includes:

1. Determine the key stresses (temperature cycle, mechanical vibration, etc.)
2. Establish a damage accumulation model (Coffin-Manson equation, etc.)
3. Calculate the equivalent acceleration factor

Recommendations for the implementation of the standard

Data quality management

According to the requirements of clause 8.3 of the standard, a closed-loop process for data collection should be established:

Confidence management

Clause 9.6 of the standard emphasizes the need to clearly define the confidence interval of the evaluation results, and recommends the use of Weibull distribution (see IEC 61649) to calculate the shape parameter β in R(t)=exp[-(t/η)^β].