| 塑料温室拱结构雪载工况下极限承载力的非线性有限元分析 |
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| 引用本文： | 俞永华,王剑平,应义斌.塑料温室拱结构雪载工况下极限承载力的非线性有限元分析[J].农业工程学报,2007,23(3):158-162. |
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| 作者姓名： | 俞永华 王剑平 应义斌 |
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| 作者单位： | 浙江大学生物系统工程与食品科学学院,杭州,310029 |
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| 摘 要： | 该文阐述了应用非线性有限元理论，对塑料温室拱结构在考虑初始缺陷条件下，进行极限承载力分析的方法。初始缺陷的模型是根据一致缺陷模态法，按最小特征值屈曲模态分布，并控制其最大值的方法确定。结构分析考虑双重非线性情况，采用弧长法跟踪整个荷载—位移全过程的平衡路径，确定极限承载力。该文以华东型连栋塑料温室在雪载工况下作实例分析，其计算结果与产品标定的承载力基本吻合，表明该方法具有较好的适用性。
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| 关 键 词： | 塑料温室 极限承载力 有限元分析 初始缺陷 |
| 文章编号： | 1002-6819(2007)3-0158-05 |
| 收稿时间： | 2006/5/19 0:00:00 |
| 修稿时间： | 2006-05-19 |
Nonlinear finite element analysis of the bearing capacity of arch structure in plastic greenhouse on snow load working condition |
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| Yu Yonghu,Wang Jianping and Ying Yibin.Nonlinear finite element analysis of the bearing capacity of arch structure in plastic greenhouse on snow load working condition[J].Transactions of the Chinese Society of Agricultural Engineering,2007,23(3):158-162. |
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| Authors: | Yu Yonghu Wang Jianping and Ying Yibin |
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| Institution: | College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China;College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China;College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China |
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| Abstract: | The method of ultimate bearing capacity calculation of the arch structure of plastic greenhouse was presented in the research. The nonlinear finite element analysis theory was applied in the method development. Based on the consistent mode imperfection method, the initial defect model was determined by the least order mode of eigenvalue buckling, and the maximum displacement value. Double nonlinear factor was considered in the structure analysis. To calculate the ultimate bearing capacity, the equilibrium path of the load and displacement using arc-length method was traced. The ultimate bearing capacity of the multi-span plastic greenhouse under snow load in the eastern-China was calculated by the method. The calculated result was close to the production-marked bearing capacity , which showed that the method was suitable. |
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| Keywords: | plastic greenhouse ultimate bearing capacity finite element analysis initial defect |
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