1.《中国修船》旨在宣传党和国家有关修造船方面的方针政策,报道国内外修船信息,探讨修船企事业单位的发展方向,介绍经营管理方面的成功经验及修船新技术、新工艺、新设备.切磋保证修船质量,缩短修船周期,提高修船效率的有力措施,为修船界积累,储存知识,促进修船技术进步.
Marine equipment sensor is an important device for sensing operational status data of marine equip-ment,and its reliability has an important impact on health evaluation and on-condition maintenance of marine equip-ment.However,due to various failure modes and a lack of effective reliability data,it is difficult to assess its reliabil-ity.The paper analyzes the failure modes and failure mechanisms of marine equipment sensors,and establishes the failure model of each failure mode and the reliability model of sensors.It gives the parameter estimation method of the reliability model.It boosts the accuracy of the reliability evaluation method by integrating field data and degraded data to compensate for reliability data.Finally,it affords an example to verify the effectiveness of the proposed method.
Under the background of carbon peak and carbon neutrality,in order to explore the impact of various factors on the energy efficiency of the main engine of a ship during navigation,this paper uses SPSS software to clean up and analyze the initial data of the main engine,such as the energy efficiency,navigation environment,and navi-gation attitude.Using the principal component analysis method,the paper extracts three principal components ac-cording to the interpretation of the total variable principal components and the gravel map to reflect the original vari-able information.Through system clustering,the energy efficiency data of the target ship are clustered by Ward method to obtain the clustering number of each parameter,and the clustering center of each parameter during naviga-tion is obtained by K-means clustering method.The shaft power,speed,and fuel consumption are fitted by Epanech-nikov,and the correlation curve is obtained.This method is universally applicable to the data mining of marine main engine energy efficiency and can provide auxiliary decision-making for intelligent energy efficiency management and evaluation.
Through an in-depth analysis of the reasons that affect the machining accuracy of reamed bolt holes,this paper proposes to optimize the machining process from six aspects:increasing the number of fine boring times,adjusting the boring tool,correcting the cutting depth,adjusting the positional degree,improving the accuracy of measuring tools,and adding honing processes.Through multiple experimental verifications,the paper proves that the proposed method can successfully achieve machining of high-precision reamed bolt holes for flange using only crankshaft and intermediate shaft.
Moss-type floating storage and regasification unit(FSRU)has a high freeboard,which makes the lateral wind force usually greater than that of the ships with the same displacement.Therefore,the mooring design is a central and difficult point in the design of this type of FSRU.This paper takes a moss-type FSRU as the research ob-ject,and conducts the layout design and mooring analyzes for the mooring system of FSRU,to ensure the long-term mooring safety of FSRU in the wharf under severe sea conditions.
