| 基于P型有限元和免疫算法的梁裂纹识别方法 | |
| 余志刚 ; 卢文秀 ; 褚福磊 ; YU Zhigang ; CHU Fulei | |
| 2010-07-15 ; 2010-07-15 | |
| 会议名称 | 2008年全国振动工程及应用学术会议暨第十一届全国设备故障诊断学术会议 ; CNKI |
| 关键词 | 固有频率 裂纹识别 p型有限元 免疫算法 Natural frequency Crack identification P-version finite element Immune algorithm TH165.3 |
| 其他题名 | AN APPROACH TO CRACK IDENTIFICATION IN BEAMS BASED ON P-VERSION FINITE ELEMENT METHOD AND IMMUNE ALGORITHMS |
| 中文摘要 | 针对基于模型的裂纹识别方法中涉及到的正反两方面问题,提出了一种利用p型有限元和人工免疫算法进行定量检测的新的有效途径。通过采用高阶的Legendre多项式作为梁单元附加形函数和线弹簧裂纹模型,给出了裂纹梁结构的p型有限元动力分析方法。该方法具有收敛速度快、单元数量少的优点。在将裂纹识别转化成优化问题后,采用了具有计算简单和良好多样性等特点的免疫算法进行了优化参数的搜索。数值结果表明:这两种方法的联合使用策略,能够有效地提高裂纹辨识问题的求解效率和识别精度。; A new way has been put forward to solve the forward and inverse problems associated with model-based crack identification,which uses immune algorithms combined with the p-version of finite element method.The p-version of finite element method are derived from the introduction of the shifted Legendre polynomials as additional shape functions within beam elements and the linear rotational spring model of crack and has many outstanding features such as rapid convergence and requiring fewer degrees of freedom.The immune algorithms which possesses the characteristics of simple implementation and avoiding premature convergence is adopted when the crack identification is converted to an optimization problem.The numerical results show that the present strategy can effectively improve the efficiency and accuracy of crack identification problems. |
| 会议录出版者 | 上海《振动与冲击》编辑部 |
| 语种 | 中文 ; 中文 |
| 内容类型 | 会议论文 |
| 源URL | [http://hdl.handle.net/123456789/67829]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 余志刚,卢文秀,褚福磊,等. 基于P型有限元和免疫算法的梁裂纹识别方法[C]. 见:2008年全国振动工程及应用学术会议暨第十一届全国设备故障诊断学术会议, CNKI. |
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