大型结构测点优化与配置-噪声与振动控制.PDFVIP

第35 卷 第6 期 噪 声 与 振 动 控 制 Vol 35 No.6 2015 年12月 NOISE AND VIBRATION CONTROL Dec. 2015 文章编号：1006-1355(2015)06-0185-06+206 大型结构测点优化与配置 戴冠帮，纪国宜 ( 南京航空航天大学 机械结构力学及控制国家重点实验室，南京 210016 ) 摘 要：对于大型结构测点的优化配置，一般传统的优化算法失效，针对传统优化算法的缺点，对大型结构的模型缩聚 做了进一步的完善，并且引入一个反映高阶模态贡献比例的权重系数。由此提出一种基于有效独立法的混合优化算法。 该算法不仅引入了对测量点选择有影响的模态动能系数，有效防止测点分布聚集现象，而且最大可能保证所有模态动能 的贡献和较优布置测点具有较大能量的要求。经火箭仿真实例和GARTEUR 飞机模态试验验证，该算法保证监测模态的 完整性和线性无关性，对大型结构的测点优化与配置具有重大的工程应用价值。 关键词：振动与波；测点优化配置；有效独立法；模态保证准则；自由度缩聚；权重系数 + 中图分类号：V214.3 3 ；O324 文献标识码：A DOI 编码：10.3969/j.issn. 1006-1335.2015.06.040 Optimization of Measurement Point Layout for Large Size Structures DAI Guan-bang , JI Guo-yi ( State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China ) Abstract : Generally speaking, traditional optimization algorithm is unlikely to optimize the layout of measurement points for large size structures. In this paper, aiming at the shortcomings of the traditional optimization algorithm, a poly-condensation model for large size structures was perfected further, and a weight coefficient, which can reflect the contribution proportions of the high-order modals, was introduced. As a result, a hybrid optimization algorithm based on effective independence method was proposed. This algorithm can effectively avoid agglomeration phenomenon in measurement point layout by introducing the modal kinetic energy coefficient which has the influence on selection of the measurement point layout, ensure all the contribution of the modal kinetic energy and satisfy the large energy require