SYT 海上钢结构疲劳强度分析推荐作法.docx

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SYT 海上钢结构疲劳强度分析推荐作法.docx

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HYPERLINK () SY/T 10049-2004 次前言 ··················，·····························?? m DNV前言·········································?? A 致谢 ·······························，···········?? V 变更 ············································?? lV 1 引言 ·····，···················，·················?? 1 1.1 总则 ···，····································?? 1 1.2 标准的有效性 ··········，················，······.····.?? 1 1.3 疲劳分析方法 ······················.···... ·......?? 1 1.4关于省略详细疲劳分析的指南····??““”‘””1 1.5 符号 ··································，··，····?? 1 2 基于疲劳试验的疲劳分析 ······························，····一 3 2.1 引言 ····。··························，·····，······?? 3 2.2 需要考虑的应力，····················，···.····...·...? ? 3 2.3 S-N曲线 ···························，············?? 4 2.4非焊接结构平均应力的影响 ····??““’‘’‘9 2.5 制造公差的影响 ·····················，·······.??，·....? ? ， 2.6 板件结构的应力集中系数 ···，··??”’“9 2.7 船舶细部的应力集中系数···，··??““12 2.8 管节点及构件的应力集中系数················，······...·...?? 12 2.9 方形截面节点的应力集中系数···························?? 18 2.10 角焊缝及部分熔透焊缝 ·····，·，·??18 2.11 螺栓 ····，······························，······?? 19 2.12 管线 ··········，································?? 19 2.13 用有限元分析法计算热点应力 ····??20 2.14 疲劳的简化分析 ·······················，·······，·..···?? 22 基于断裂力学的疲劳分析································?? 26 3.1 引言········································，··? 26 4 通过制造提高疲劳寿命···················，·······.........? ? 27 4.1 总则·····································，·····?? 27 4.2 通过机加工和打磨进行焊缝外观处理··························?? 27 4.3 打磨·，·····························，···。··········?? 28 4.4 钨极惰性气体保护焊 CTIG)表面处理 ························?? 28 4.5 锤击············································?? 28 延长的疲劳寿命···································.·?? 29 6 疲劳寿命预测中的不确定性··，··，·??29 6.1 总则·································，·······? ? 29 7 参考文献·，········，·······························?? 30 附录A (规范性附录) 构造细部的分类 ··························，?? 33 T HYPERLINK () HYPERLINK () HYPERLINK () SY/T 10049-2004 DNV 前言挪威船级社 (DNV)是一个旨在保护海上及岸上