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小水线面双体船连接桥结构多轴疲劳分析方法

DOI: doi:10.3969/j.issn.1006-7043.2011.06.004

Keywords: 小水线面双体船, 多轴疲劳强度, 疲劳评估, 连接桥结构

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Abstract:

针对小水线面双体船(SWATH)连接桥处承受多轴应力这一现象,开展了此结构的多轴疲劳分析方法研究. 在传统S??N曲线法的基础上利用基于Tresca准则的等效应变方法和Brown??Miller临界面法,给出了2种多轴疲劳评估的简化方法,推导出了每种方法的疲劳寿命计算公式. 参照规范工况采用提出的新方法对某SWATH进行了疲劳强度评估,并将计算结果和现有规范方法进行了比较,结果表明多轴应力的影响不容忽略.

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