基于遗传算法的水轮机振动参数识别  

Vibration parameters identification of hydraulic turbine based on genetic algorithm

作　　者：刘迎曦[1] 李生[1] 李守巨[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《计算力学学报》2003年第5期541-545,共5页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金 ( 10 0 72 0 14 ) ;高校博士点专项基金 ( 2 0 0 0 0 170 7)资助项目

摘　　要：通过对水轮机现场测试数据的频域分析 ,建立了测点位移响应的参数正模型。并基于遗传算法 ,建立了在时域内识别结构振动参数的数值方法 ,采用该方法对水轮机位移响应正模型的待定参数识别进行了研究。计算结果表明 ,所建立的基于遗传算法的参数识别方法具有良好的稳定性、抗观测噪声能力和较高的识别精度 ,能够反演出比较符合实际情况的位移响应振动模型。这就为荷载识别。A direction model of displacement response was established by the Fourier analysis to measured data. And based on the genetic algorithm, the parameter identification procedure put forward in the time domain was applied to study the vibration parameters identification of displacement-response of the hydraulic turbine. The computational results indicate that the procedure has better stability and ability to resist measurement noises, and better identification precision, by which the satisfied vibration model can be set up. Furthermore, the post-steps, such as the loading identification, optimum structure and prediction of damping of vibration effect etc., can be implemented reliably.

关 键 词：遗传算法 水轮机 振动响应 参数识别 测点位移响应 水轮发电机组 

分 类 号：TK730.1[交通运输工程—轮机工程] TM312[动力工程及工程热物理—流体机械及工程]