船体结构钢中夹杂物对船体抗疲劳性能的影响  

Effects of inclusions on the hull structure anti-fatigue performance

作　　者：张晓芳[1] 赵寰宇[2] 

机构地区：[1]河北机电职业技术学院,河北邢台054000 [2]北京交通大学,北京100044

出　　处：《舰船科学技术》2015年第3期226-229,共4页Ship Science and Technology

摘　　要：为研究船身钢结构中夹杂物对其抗疲劳性能的影响,取船身钢板一部分作为研究对象。将钢板受力情况简化为2种不同工况,并对其进行应力计算,研究夹杂物对不同工况下结构抗疲劳性能的影响。由于结构抗疲劳性能与其应力最大值有直接联系,然而应力在结构中的分布并不均匀,因此研究钢板结构在不同工况以及不同夹杂物位置情况下应力最大值出现规律。结果表明,船身结构在低应力区域出现夹杂物时,对结构应力最大值的影响较小。在船身高应力区域出现夹杂物时,结构应力最大值受到较大影响,具有明显增加的趋势。对于工况1,钢板结构两侧应力增加的最为显著,向结构中心逐渐递减;对于工况2,钢板结构中心部位应力增加较为显著,向结构两侧则有递减的趋势。In order to study the inclusions in the hull steel structure on its fatigue resistance,taking part of hull steel plate as the research object. We simplify the plate stress distribution for two different loading conditions,the inclusion influence on structure fatigue performance under different conditions are contrasted based on the stress calculation with finite element analysis technology. Since the structure fatigue resistance performance is directly influenced by its maximum stress, however, the stress distribution in the structure was not uniform,it is of great importance to study the steel structure anti-fatigue performance with different inclusions position and different loading conditions. The results show that when the hull structure at low stress area appeared inclusions,it will have less effect on the structure maximum stress. However,the inclusions will have great influenced on the area with high stress,the structural maximum stress will increase obviously. For the loading case 1,on both sides of the steel structure stress increased most significantly,and to structure center gradually diminishing. For the loading case 2,steel structure stress near the center of the increase is significant,and the structure has decreasing trend on both sides.

关 键 词：船身结构 抗疲劳 应力 夹杂物 

分 类 号：U661.43[交通运输工程—船舶及航道工程]