地震与波浪联合作用下海洋平台动力特性分析
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摘要
主要针对地震与波浪联合作用下空间导管架式海洋平台结构的动力响应特性进行研究。以春晓平台结构为例,利用ANSYS程序进行了动力响应的数值计算,分析中考虑了地震设防烈度、风浪条件及场地土类型等因素对结构响应的影响,并与地震单独作用下的结构响应进行了对比。分析结果表明,抗震设防烈度较低、中等及较大风浪条件下对海洋平台结构进行抗震分析时有必要考虑地震与波浪的联合作用。
In this study,the dynamic response characteristic of a steel jacket platform under the combination of seismic action and wave action is investigated.The spatial model of a Chun Xiao platform in East China Sea is established in Ansys program for numerical calculation of dynamic response.The parameters which will affect the platform response are analyzed,such as seismic intensity,wind wave state and the condition of the site where the platform is located,and the platform response under both actions is compared simultaneously with the one that is under only seismic action.The results show that when the seismic intensity is low and wind wave state is moderate or rough,considering the combination of seismic action and wave action is necessary for the seismic analysis of offshore platforms.
In this study,the dynamic response characteristic of a steel jacket platform under the combination of seismic action and wave action is investigated.The spatial model of a Chun Xiao platform in East China Sea is established in Ansys program for numerical calculation of dynamic response.The parameters which will affect the platform response are analyzed,such as seismic intensity,wind wave state and the condition of the site where the platform is located,and the platform response under both actions is compared simultaneously with the one that is under only seismic action.The results show that when the seismic intensity is low and wind wave state is moderate or rough,considering the combination of seismic action and wave action is necessary for the seismic analysis of offshore platforms.
引文
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[2]王涛,尹宝树,陈兆林.海洋工程[M].济南:山东教育出版社,2004.66-68.
[3]李茜,杨树耕.采用ANSYS程序的自升式平台结构有限元动力分析[J].中国海洋平台,2003,18(4):41-46.
[4]杨树耕,藤明清,孟昭瑛,等.有限元分析软件ANSYS在海洋工程中的应用(续1)[J].中国海洋平台,2000,15(5):40-46.
[5]竺艳蓉.海洋工程波浪力学[M].天津:天津大学出版社,1991.42-48.
[6]张保军,于春洁.春晓气田群井口平台结构形式研究[J].中国海上油气,2003,15(1):29-31.
[7]李宏男.建筑抗震设计原理[M].北京:中国建筑工业出版社,1997.
[8]郭继武.建筑抗震设计[M].北京:中国建筑工业出版社,2002.
[9]Li H N,He X Y,Huo L S.Seismic response control of offshore platform structrues with shape memory alloy dampers[J].China OceanEngineering,2005,19(2):185-194.
[10]日本港湾协会.港口建筑物设计标准[M].北京:人民交通出版社,1979.72-74.
[11]Zhang Y H,Shen Y M,Qiu D H.Numerical simulation of wave height and wave set-up in nearshore regions[J].China Ocean Engi-neering,2001,15(1):15-23.
[12]谢礼立,翟长海.最不利设计地震动研究[J].地震学报,2003,25(3):250-261.
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