彩色噪声输入下的场桥结构工作模态参数识别技术  

Techniques for identifing yard crane structure's operational modal parameters with color noise inputs

作　　者：张卫国[1,2] 邱惠清[1] 卢凯良[2] 郝志永[2] 刘园[2] 

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]上海海事大学物流工程学院,上海201306

出　　处：《上海海事大学学报》2012年第3期31-35,共5页Journal of Shanghai Maritime University

基　　金：上海市浦江人才计划(10PJ1404700);上海市教育委员会重点创新项目(12ZZ149);上海市教育委员会"上海高校青年教师培养资助计划"(shs11023);上海海事大学校基金(20110037;20110041)

摘　　要：为检验在彩色噪声输入下平衡实现(Balance Realization,BR)法对港机结构工作模态参数识别的有效性,对工程上常见的彩色风谱及路谱进行数值模拟,并将其加载在场桥结构的有限元模型上进行计算,得到结构各节点的输出响应;应用BR法对结构的输出响应进行模态参数识别,得到的结果与用有限元方法计算的结果吻合良好,且其各阶模态相互独立、正交性良好.由此表明,可应用BR法进行港机结构彩色噪声输入下的工作模态参数识别.In order to check the validation of Balance Realization （BR） method in identifying the operational modal parameters of portal machine structure while the system inputs color noise, the wind load spectra and road spectra with color noise are simulated, and then the two color noise are loaded on the finite element model of the yard crane structure to obtain the output response of each joint. The BR method is adopted to identify the modal parameters based on the output response of the structure, and the result accords with that calculated by finite element method. The modals of each stage are mutually independent and have good orthogonality. This verifies that BR method can be used to identify the operational modal parameters of the portal machine structure while the system inputs color noise.

关 键 词：场桥 彩色噪声 工作模态参数 平衡实现法 风谱 路谱 

分 类 号：U653.921[交通运输工程—港口、海岸及近海工程] TB115.1[交通运输工程—船舶与海洋工程]