特大型钢吊箱在波浪荷载作用下动力响应研究
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摘要
采用子空间迭代得到了特大型钢吊箱结构的各阶频率和振型,并采用特征波法分析了其按余弦规律变化的波浪荷载作用下的动力响应。结果表明:规则余弦波浪对结构动力响应的影响较小。建议在设计钢吊箱时,可以在静力分析的基础上适当乘以一个放大系数来考虑动力的影响。
The subspace iteration method was adopted to obtain the frequencies and modes of steel suspending cofferdams.The dynamic response of such structure under cosine wave loads was obtained using the characteristic wave method.Results show that the regular cosine waves have little effect on the dynamic response of structure.Finally,it is suqgested that a dynamic magnification factor based on the static analysis should be adopted to consider the dynamic influence for the design of steel suspending cofferdams.
The subspace iteration method was adopted to obtain the frequencies and modes of steel suspending cofferdams.The dynamic response of such structure under cosine wave loads was obtained using the characteristic wave method.Results show that the regular cosine waves have little effect on the dynamic response of structure.Finally,it is suqgested that a dynamic magnification factor based on the static analysis should be adopted to consider the dynamic influence for the design of steel suspending cofferdams.
引文
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[6]谢小松,徐伟,宋灿,骆艳斌,王旭峰.深水高桩承台哑铃状钢吊箱在地震作用下的响应分析[J].结构工程师, 2005,21(6):43 - 45.(XIE Xiao-song,XU Wei,SONG Can, LUO Yan-bin,WANG Xu-feng.Response analysis of elevated pile foundation dumbbell-shape steel suspending cofferdam in deep water under seismic action[J].Structural Engineers,2005,21(06):43 - 45.(in Chinese))
[7]徐伟,宋灿,骆艳斌,谢小松.深水高桩承台钢吊箱在风荷载作用下的动力性能分析[J].工业建筑,2007,37(7): 82 - 84.(XU Wei,SONG Can,LUO Yan-bin,XIE Xiao-song. Analysis of dynamic property of elevated pile foundation steel suspending cofferdam in deep water under wind load[J]. Industrial Construction,2007,37(7):82 - 84.(in Chinese))
[2]骆艳斌,徐伟,宋灿.不同形状钢吊箱动力特性比较分析[J].结构工程师,2006,22(3):41-45.(LUO Yan-bin, XU Wei,SONG Can.Comparative analysis on dynamic behavior of steel suspension boxes with different forms[J]. Structural Engineers,2006,22(3):41 - 45.(in Chinese))
[3]夏震寰.现代水力学(四)波浪力学[M].北京:高等教育出版社,1992.(XIA Zhen-huan.The modem hydromechanics (Ⅳ) wave mechanics[M].Beijing:Higher Education Press, 1992.(in Chinese))
[4]竺艳蓉.海洋工程波浪力学[M].天津:天津大学出版社, 1991.(ZHU Yan-rong.Ocean engineering wave mechanics[M].Tianjin:Tianjin University Press,1991.(in Chinese))
[5]JTJ213—98海港水文规范[S].北京:人民交通出版社,1998. (JTJ213—98 Seaport hydrological standard[S].Beijing: China Communications Press,1998.(in Chinese))
[6]谢小松,徐伟,宋灿,骆艳斌,王旭峰.深水高桩承台哑铃状钢吊箱在地震作用下的响应分析[J].结构工程师, 2005,21(6):43 - 45.(XIE Xiao-song,XU Wei,SONG Can, LUO Yan-bin,WANG Xu-feng.Response analysis of elevated pile foundation dumbbell-shape steel suspending cofferdam in deep water under seismic action[J].Structural Engineers,2005,21(06):43 - 45.(in Chinese))
[7]徐伟,宋灿,骆艳斌,谢小松.深水高桩承台钢吊箱在风荷载作用下的动力性能分析[J].工业建筑,2007,37(7): 82 - 84.(XU Wei,SONG Can,LUO Yan-bin,XIE Xiao-song. Analysis of dynamic property of elevated pile foundation steel suspending cofferdam in deep water under wind load[J]. Industrial Construction,2007,37(7):82 - 84.(in Chinese))
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