Method for calculating replacement period of normal type part with service life

Abstract

The invention discloses a method for calculating the replacement period of a normal type part with service life. The method includes: calculating a damage replacement probability; calculating availability, to be more specific, performing normality equivalence on the service life of the normal type part with the service life, and calculating the availability according to normality equivalence parameters; using the availability to calculate a spare part demand quantity. Compared with a calculation method which does not distinguish the life and the service life of the normal type part with the service life in the prior art, the method can evidently increase the accuracy of a calculation result.

Description

technical field [0001] The invention belongs to the field of life part replacement evaluation and relates to a calculation method for normal life part replacement period. Background technique [0002] Life-saving parts are parts that have stipulated the period of preventive maintenance, replacement or scrapping and parts whose service life can be estimated, also known as life-limited parts. In the field of aviation, aircraft spare parts are usually divided into initial spare parts, follow-up spare parts and end-of-life spare parts. The use of life parts can effectively prevent failures, so the use of life parts especially in the aviation field has great practical significance. Replacement cycle is an important parameter of life parts. There are not many relevant domestic researches on what method can be adopted to obtain a scientific and reasonable replacement cycle. [0003] The lifespan and working life of a serviceable part are two different concepts. The lifespan does ...

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Problems solved by technology

[0008] For problem 1), the best working condition is to replace the serviceable part when it is working to the deadline, and it is not desirable to replace it due to failure, and the consequences may be very serious

[0009] For question 2), when the replacement cycle is shorter, it is possible to need more spare parts

Question 2) Describe the economic cost of a selected replacement cycle from the perspective of spare parts procurement costs

[0010] Therefore, under the above background, it is especially necessary to propose a method for calculating the replacement cycle. The solution in the current prior art is to use empirical values ​​to calculate the parameters of problem 1) and problem 2). In this case, the rationality of the replacement cycle (the rationality mainly refers to the balance between cost and benefit, where the cost is reflected in the purchase cost of spare parts, and the benefit is reflected in the probability of replacement at the end of life) is difficult to guarantee, and quantitative calculation is basically impossible

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