Method for determining the demand quantity of spare parts of a multi-Weibull unit part for overall part replacement and maintenance of a large cargo ship

A technology to determine the method and demand, which is applied in the direction of instruments, data processing applications, logistics, etc., can solve problems such as inaccuracy and difficult calculation of spare parts demand, and achieve good results

Inactive Publication Date: 2019-03-19
青岛航讯网络技术服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The invention provides a method for determining the demand for spare parts of multiple Weibull unit parts for the overall replacement and maintenance of large freighters, which solves the problem of difficult and inaccurate calculation of the demand for spare parts in the support design process of mechanical equipment

Method used

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  • Method for determining the demand quantity of spare parts of a multi-Weibull unit part for overall part replacement and maintenance of a large cargo ship
  • Method for determining the demand quantity of spare parts of a multi-Weibull unit part for overall part replacement and maintenance of a large cargo ship
  • Method for determining the demand quantity of spare parts of a multi-Weibull unit part for overall part replacement and maintenance of a large cargo ship

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Embodiment 1

[0051] Example 1, a certain 12 / 15 component is composed of 15 battery cells, when the number of effective cells is less than 12, it is determined that the component is faulty, and the overall replacement is performed for maintenance. The battery unit obeys the Weibull distribution W(1000,2). Under the requirement that the guarantee success rate P is not less than 0.85, calculate the number of spare parts required for the guarantee time of 2000h, including the steps of establishing Gamma equivalent parts, setting the initial value, calculating the guarantee probability and judging steps:

[0052] (1) Set up the Gamma equivalent component step, including the following sub-steps:

[0053] (1.1) Establish a unit life matrix: establish a unit life matrix M with 2000 rows and 15 columns. Each element in M ​​is randomly generated and obeys the W(1000,2) distribution. 1000 and 2 are W(1000,2) respectively. Scale parameters and shape parameters are determined by unit characteristics; ...

Embodiment 2

[0072] Example 2, a 3 / 5 part is composed of 5 circuit breaker units, when the number of effective units is less than 3, it is determined that the part is faulty, and the whole part is replaced for maintenance. The circuit breaker unit obeys the Weibull distribution W(1500,2.3). Under the requirement that the guarantee success rate P is not less than 0.9, calculate the number of spare parts required for the guarantee time of 3000, including the steps of establishing Gamma equivalent parts, setting the initial value, calculating the guarantee probability and judging steps:

[0073] (1) Set up the Gamma equivalent component step, including the following sub-steps:

[0074] (1.1) Establish a unit life matrix: establish a unit life matrix M with 2000 rows and 5 columns. Each element in M ​​is randomly generated and obeys the W(1500,2.3) distribution. 1500 and 2.3 are W(1500,2.3) respectively. Scale parameters and shape parameters are determined by unit characteristics; use the wbl...

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Abstract

The invention discloses a method for determining the demand quantity of spare parts of a multi-Weibull unit part for overall part replacement and maintenance of a large cargo ship, belongs to a mechanical equipment supportability design method, and solves the problem that the demand quantity of the spare parts is difficult and inaccurate to calculate in the supportability design process of the mechanical equipment. The method comprises the steps of Gamma equivalent part establishment, initial value setting, guarantee probability calculation and judgment. According to the reliability characteristic of the Weibull unit, the number of the spare parts can be quickly calculated on the basis of the real reliability structure of the multi-unit k/N voting component, and the problem that the calculation of the demand quantity of the spare parts in the existing mechanical equipment supportability design is inaccurate is solved. In the supportability design stage and the train installation operation stage of the mechanical equipment, the demand quantity of spare parts can be accurately determined, the related cost of the mechanical equipment in the whole life cycle can be accurately estimated, and technical support is provided for evaluating the cost-to-efficiency ratio state of the mechanical equipment, achieving good guarantee of the mechanical equipment and guaranteeing the mechanicalequipment.

Description

technical field [0001] The invention belongs to a design method for mechanical equipment support, in particular to a method for determining the demand for spare parts of multiple Weibull unit parts for the overall replacement and maintenance of a large freighter. Background technique [0002] The demand for spare parts is a specific attribute in the guarantee of mechanical equipment, and the cost corresponding to spare parts is an important part of the cost of mechanical equipment during the whole life. Accurately calculating the demand for spare parts is of great significance to both the supportive design of mechanical equipment and the effective operation of mechanical equipment. [0003] In the hierarchical structure of mechanical equipment: mechanical equipment is composed of a variety of components, and the components are composed of N units (N≥1); the units are connected in series or in a certain reliability structure to form components. It is called a component with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/08
CPCG06Q10/087
Inventor 赵中元
Owner 青岛航讯网络技术服务有限公司
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