Method of evaluating fatigue level of constituent component of marine diesel engine, fatigue level evaluation device, remaining lifetime diagnosing method, remaining lifetime diagnosing device, and system

Abstract

Provided is a method of evaluating a fatigue level of a constituent component of a marine diesel engine. The method comprises: generating, with respect to a constituent component, at least two of an operation load evaluation point relating to an operation load of a marine diesel engine, an operation load variation evaluation point relating to variation of the operation load of the marine diesel engine, an operation cycle evaluation point relating to an operation cycle of the marine diesel engine, a fuel characteristic evaluation point relating to the fuel characteristic of the marine diesel engine, a combustibility evaluation point relating to the combustibility of the fuel, and an exhaust gas temperature evaluation point relating to the temperature of exhaust gas from the marine diesel engine; calculating a total evaluation point of the fatigue level of the constituent component by adding up the at least two evaluation points that have been generated; and evaluating the fatigue levelof the constituent component on the basis of the total evaluation point.

Description

technical field [0001] The present invention relates to a fatigue degree evaluation method, a fatigue degree evaluation device, a remaining life diagnosis method, a remaining life diagnosis device, and a system for components of a marine diesel engine. Background technique [0002] Conventionally, with regard to the maintenance of parts constituting marine diesel engines (hereinafter sometimes simply referred to as engines), written materials such as operation manuals have specified recommended maintenance intervals and maintenance periods based on engine operating hours (Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent No. 5550969 [0006] However, the maintenance period recorded in existing written materials is not determined according to the actual use conditions such as the operating conditions of the engine, the properties of the fuel used, and the like. Actually, for example, when the ratio of th...

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Problems solved by technology

As a result, unnecessary work time, work costs, and parts replacement costs are generated, and there is a problem that the efficiency of engine operation is reduced.

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