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概要
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With rapid progress in the technology of central-control systems for ships, a need for the reliability of main diesel engines and related equipment has been created. Towards this end, various methods, such as the reliability designing method, endurance testing method, system of monitoring abnormalities, system of maintenance and repairs, and so on, have been developed. But first of all, it is necessary to analyze the performance of the main diesel engine and its related equipment under service conditions, i.e. while the ship is running, before any such methods can be developed.<BR>This report deals with our experiments conducted aboard a 110, 000 DWt ore carrier in service on routes from Japan to South America or Australia. For the nearly two years since it was commissioned, we have kept continuous measurement and record of various aspects of its operation in relation to navigational conditions and engine performance in order to analyze the load and operating conditions of the engine and the aging of the ship and engine.<BR>As the results, it is understood that the load and operating conditions of the main diesel engine undergo complicated changes according to various conditions such as the ship's navigational conditions, aging, surrounding conditions, and etc. while the ship is running. We think some details of such changes have been clarified by our experiments. And through the various analyses, we have translated the complicated load conditions into a simplified pattern and estimated the influences of aging.<BR>The results, we believe, could be used as the basis for designing more reliable engines and making endurance test. On the basis of the data we have obtained, it is also possible to establish standards for producing systems for monitoring engine performance, for detecting abnormalities and for maintaining and repairing the engine.<BR>The data of our experiments and the results of their analysis will find many applications and will be useful in improving the reliability of marine diesel engines.
- 公益社団法人 日本マリンエンジニアリング学会の論文
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