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Ship transmission device belt seawater cooling system evaluation method

A transmission device and cooling system technology, applied in the field of reliability evaluation of marine seawater cooling hydraulic system based on T-S fault tree, to achieve the effect of eliminating the dependence of durability life information value

Pending Publication Date: 2022-01-28
中国船舶重工集团公司第七0三研究所
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the existing methods, the present invention provides a method for evaluating the reliability of the marine sea water cooling hydraulic system based on the T-S fault tree, which solves the problem of the dependence of the traditional fault tree analysis method on the basic failure rate of the unit, and realizes the Efficient and accurate reliability assessment of marine seawater cooling hydraulic system

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  • Ship transmission device belt seawater cooling system evaluation method
  • Ship transmission device belt seawater cooling system evaluation method
  • Ship transmission device belt seawater cooling system evaluation method

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] combine Figure 1 to Figure 5 , the steps of the present invention are as follows:

[0036] S1: Analyze the failure of the ship's seawater cooling hydraulic system and select the top event;

[0037] Analyze the possible failures of the ship's seawater cooling hydraulic system, analyze the dangerous events caused by all failure modes, and take the cooling effect of the centrifugal seawater pump as the top event;

[0038] S2: The fuzzy occurrence probability of basic events is judged subjectively by experts:

[0039] Starting from the possible events that cause the pressure drop and flow reduction of the centrifugal seawater pump, the direct and indirect causes of the pressure drop and flow reduction of the centrifugal seawater pump are analyzed layer by layer, and these reasons are considered as basic events.

[0040]Among th...

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Abstract

The invention provides a ship transmission device belt seawater cooling system evaluation method, which comprises the following steps: (1) analyzing a fault of a ship seawater cooling hydraulic system, and selecting a top event; (2) subjectively judging the fuzzy occurrence probability of the basic event through an expert; (3) constructing a T-S fuzzy fault tree; and (4) calculating the occurrence probability of the top event by using and / or a fuzzy operator. According to the method, the reliability of the ship seawater cooling hydraulic system can be effectively evaluated, the problem that a traditional dynamic fault tree cannot be effectively evaluated due to imperfect unit probability measurement and unclear system failure mechanism is solved, and the efficiency and accuracy of the risk evaluation method for the ship seawater cooling hydraulic system are improved.

Description

technical field [0001] The invention relates to a method for evaluating system reliability, in particular to a method for evaluating reliability of a marine seawater cooling hydraulic system based on a T-S fault tree. Background technique [0002] The mechanical equipment in the marine diesel engine power plant will continuously generate heat during normal operation, a part of the heat will be converted into mechanical energy, and the remaining heat will continue to accumulate, causing the temperature of the mechanical equipment to continue to rise. If this part of the heat is not transferred out, the strength of the material will decrease Fatigue and embrittlement may occur, and even lead to the seizure of friction pair parts, resulting in major safety accidents. The ship's seawater cooling hydraulic system plays an important role in transferring excess heat, and the reliability assessment of the ship's seawater cooling hydraulic system is of great significance to the safe ...

Claims

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Application Information

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IPC IPC(8): F15B19/00F15B21/00G06F30/15G06F30/17G06N7/00G06N7/02G06F111/08G06F119/02G06F119/08
CPCF15B19/005F15B19/007F15B21/00G06F30/15G06F30/17G06N7/02G06F2111/08G06F2119/02G06F2119/08G06N7/01
Inventor 邵钢刘强闫沈松艾红旭
Owner 中国船舶重工集团公司第七0三研究所
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