大型结构地面模态试验测点选择与优化
发布时间：2018-07-15 18:04
【摘要】：为了解决一般传统的优化算法对于大型结构测点的优化配置的失效问题,针对传统优化算法的缺点,对大型结构的模型缩聚技术做了进一步的改进和完善。引入了一个反映高阶模态贡献比例的权重系数,由此提出了一种基于有效独立法的混合优化算法:基于有效独立法的加权平均模态应变能系数法。经火箭仿真实例对上述方法及Guyan缩聚基于模态应变能系数有效独立法、改进后Guyan缩聚基于模态应变能系数有效独立法得到的测点配置效果进行了比较。结果表明:提出的测点优化算法有效地防止了测点分布聚集现象,而且都最大可能保证了所有模态应变能的贡献和较优布置测点具有较大能量的要求,并用实际的GARTEUR飞机模型对该方法进行了模态试验验证。试验结果表明,该算法保证了监测模态的完整性和线性无关性。
[Abstract]:In order to solve the problem of failure of the traditional optimization algorithms for the optimal configuration of large structures, the model condensation technology of large structures is further improved and perfected in view of the shortcomings of the traditional optimization algorithms. This paper introduces a weighted coefficient which reflects the proportion of higher-order modal contribution, and presents a hybrid optimization algorithm based on effective independence method: the weighted average modal strain energy coefficient method based on effective independence method. The results of the above methods and the effective independent method based on the modal strain energy coefficient for Guyan Polycondensation are compared with those obtained by the effective independent method based on the effective Modal strain Energy coefficient of the improved Guyan Polycondensation. The results show that the proposed optimization algorithm can effectively prevent the distribution and aggregation of the measured points, and the contribution of all modal strain energy and the requirement of larger energy for the optimal layout of the measuring points can be guaranteed to the maximum extent. The modal test of this method is carried out with the actual GarTEUR aircraft model. The experimental results show that the proposed algorithm ensures the integrity and linearity independence of the monitoring modes.
【作者单位】： 国营芜湖机械厂结构部;南京航空航天大学机械结构力学及控制国家重点实验室;
【基金】：国防军工资助项目 江苏高校优势学科建设工程资助项目
【分类号】：TH113.1
[Abstract]:In order to solve the problem of failure of the traditional optimization algorithms for the optimal configuration of large structures, the model condensation technology of large structures is further improved and perfected in view of the shortcomings of the traditional optimization algorithms. This paper introduces a weighted coefficient which reflects the proportion of higher-order modal contribution, and presents a hybrid optimization algorithm based on effective independence method: the weighted average modal strain energy coefficient method based on effective independence method. The results of the above methods and the effective independent method based on the modal strain energy coefficient for Guyan Polycondensation are compared with those obtained by the effective independent method based on the effective Modal strain Energy coefficient of the improved Guyan Polycondensation. The results show that the proposed optimization algorithm can effectively prevent the distribution and aggregation of the measured points, and the contribution of all modal strain energy and the requirement of larger energy for the optimal layout of the measuring points can be guaranteed to the maximum extent. The modal test of this method is carried out with the actual GarTEUR aircraft model. The experimental results show that the proposed algorithm ensures the integrity and linearity independence of the monitoring modes.
【作者单位】： 国营芜湖机械厂结构部;南京航空航天大学机械结构力学及控制国家重点实验室;
【基金】：国防军工资助项目 江苏高校优势学科建设工程资助项目
【分类号】：TH113.1
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1 D.J.EWINS;包益民;;模态试验:理论和实践(连载6)[J];振动.测试与诊断;1988年01期
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