单层网壳结构风振响应的模态耦合效应分析
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摘要
基于网壳结构频谱分布密集、空间相关性强的自身特性,其风致动力响应不仅要考虑多阶模态的贡献,通常还要考虑模态耦合效应。因此,对网壳结构风振响应的模态耦合效应进行研究很有必要。根据模态广义位移协方差矩阵的特性,对K iew itt6-6型单层球面网壳和三向网格单层柱面网壳结构的模态耦合效应进行了系统的参数分析,在此基础上,给出了网壳结构风振响应的模态耦合效应程度判据。
In analysis of wind induced vibration for single-layer reticulated shell structures,it is found that there are some modes in high position of modes order with significant contribution to wind induced response,and the modal coupling effect is also need to be considered owing to the closely located modal frequencies and strong interaction of structural members.According to the characteristic of the modal displacement covariance matrix,parametric analysis of the modal coupling effect for the wind-induced vibration are performed on a Kiewitt 6-6 type of single-layer spherical reticulate shell and a threeway grid single-layer cylindrical reticulate shell.Further more,a criterion for the modal coupling effect is proposed.
In analysis of wind induced vibration for single-layer reticulated shell structures,it is found that there are some modes in high position of modes order with significant contribution to wind induced response,and the modal coupling effect is also need to be considered owing to the closely located modal frequencies and strong interaction of structural members.According to the characteristic of the modal displacement covariance matrix,parametric analysis of the modal coupling effect for the wind-induced vibration are performed on a Kiewitt 6-6 type of single-layer spherical reticulate shell and a threeway grid single-layer cylindrical reticulate shell.Further more,a criterion for the modal coupling effect is proposed.
引文
1辛庆胜,周岱,马骏.大跨斜拉网格结构耦合风振响应分析计算的研究现状及发展前景[J].振动与冲击,2005,24(1):24—27
2星谷胜.随机振动分析[M].北京:地震出版社,1997,121—132
3 Edward L W ilson.A rep lacem ent for the SRSS m ethod in se ism ic[J].EESD,1981(9):187—194
4 K iuregh ian A D.Response spectrum m ethod for mu lti-supportse ism ic exc itations[J].EESD,1992(21):713—740
5 E Hered ia-Zavon i.Se ism ic random-vibration analysis ofmu ltisup-port-structural system s[J].EESD,1994,120(5):1107—1128
6林家浩,钟万勰.关于虚拟激励法与结构随机响应的注记[J].计算力学学报,1998,15(2):217—223
7胡继军,李春祥,黄金枝.网壳风振响应主要贡献模态的识别及模态相关性影响分析[J].振动与冲击,2001,20(1):22—25
8沈世钊,陈昕.网壳结构稳定性[M].北京:科学出版社,1999,88—162
9 M asanao Nakayam a,Yasuh ito Sasak i,Ke ijiM asuda,Thosh iyuk iOgawa.An effic ientm ethod for selection of vibration modes con-tributory to w ind response on dom e-like roofs[J].Journal ofW indEngineering and Industrial Aerodynam ics,1998(73):31—43
2星谷胜.随机振动分析[M].北京:地震出版社,1997,121—132
3 Edward L W ilson.A rep lacem ent for the SRSS m ethod in se ism ic[J].EESD,1981(9):187—194
4 K iuregh ian A D.Response spectrum m ethod for mu lti-supportse ism ic exc itations[J].EESD,1992(21):713—740
5 E Hered ia-Zavon i.Se ism ic random-vibration analysis ofmu ltisup-port-structural system s[J].EESD,1994,120(5):1107—1128
6林家浩,钟万勰.关于虚拟激励法与结构随机响应的注记[J].计算力学学报,1998,15(2):217—223
7胡继军,李春祥,黄金枝.网壳风振响应主要贡献模态的识别及模态相关性影响分析[J].振动与冲击,2001,20(1):22—25
8沈世钊,陈昕.网壳结构稳定性[M].北京:科学出版社,1999,88—162
9 M asanao Nakayam a,Yasuh ito Sasak i,Ke ijiM asuda,Thosh iyuk iOgawa.An effic ientm ethod for selection of vibration modes con-tributory to w ind response on dom e-like roofs[J].Journal ofW indEngineering and Industrial Aerodynam ics,1998(73):31—43
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