船舶疲劳强度评估等效设计波法研究  

Research on the equivalent design wave approach for fatigue assessment of ocean structures

作　　者：刘亮[1] 任慧龙 冯国庆 

机构地区：[1]哈尔滨工程大学船舶与海洋工程力学研究所,黑龙江哈尔滨150001

出　　处：《舰船科学技术》2014年第7期33-36,共4页Ship Science and Technology

摘　　要：在现有船舶疲劳强度评估设计波法基础上,对设计波的选取和应力范围的计算部分进行改进。提出一种更能全面考虑船舶载荷状态的设计波选取方法,同时定义一种更为准确的应力范围选取方法。以1艘散货船为例,根据筛选的设计波,进行疲劳损伤的计算,比较本文提出的改进的设计波法和原有谱分析法得到的疲劳寿命值,验证本文提出方法的可行性和优越性。A new approach for selection of equivalent design wave（EDW） and calculation of stress range is brought forward based on the existed design load approach for fatigue assessment. A new method of confirming EDWs is put forward, which could cover all the load cases ship structures suffer and a new and precise method of calculating stress range follows. The fatigue damage of a BC is got based on the selected EDWs. The feasibility and advantage of the method is confirmed by the comparision of the fatigue life to the spectrum analysis

关 键 词：设计波 控制载荷 疲劳损伤 

分 类 号：U661.4[交通运输工程—船舶及航道工程]