碟式太阳能光热发电系统机架结构风振响应的时域分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (7) : 177-185.

论文

颜健，彭佑多，易陈斐

作者信息 +

Time-domain analysis of wind-induced response of dish solar thermal power generation system rack structure

YAN Jian，PENG You-duo，YI Cheng-fei

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文章历史 +

摘要

针对大型碟式光热系统抗风运行的机架风致振动问题，以研制的25KW级碟式机架为对象，阐述了复杂机架结构的有限元建模方法，并通过静力承载和机构传动角的分析，指出了高度角驱动机构的不足并予以改进，进而对比分析了改进前后机架多高度角工况的自振特性。基于线性滤波AR法模拟得到25组工况的脉动风载荷(平均风速16.0m/s)，开展了改进机架的风振时域求解。分析了机架关键节点的位移响应均方根和峰值分布特征，并对典型工况的机架位移响应进行了频谱分析，给出了各工况机架关键节点的位移风振系数，为机架结构设计提供参考。结果表明，机架结构位移响应是以脉动载荷的强迫振动为主，并伴有多阶振型参与的共振响应。机架控制点的位移峰值和位移均方根的分布特征相似，且沿焦轴的响应分量均是占主导地位，机架振动主要为机架视日部分绕高度角轴线的旋转运动。

Abstract

According to the wind-induced vibration problems of a large dish rack thermal systems running wind，taking the develop 25KW disk rack as the research object，elaborated the finite element modeling method of complex frame structure，and through the analysis of static load and transmission angle，pointed out the elevation angle driving mechanism deficiencies and to be improved，then comparative analysis of the vibration characteristics of multi-rack elevation angle of the frame before and after improvement. Based on the linear filtering method of AR scored 25 groups of conditions of fluctuating wind load (average wind speed 16.0 m/s)，carry out the wind vibration time domain solution improved frame. Analysis of the frame of key nodes displacement response characteristics of root mean square and peak distribution，and analyzes the frame of typical working condition of displacement response spectrum analyses，given the displacement wind vibration coefficient of various operating conditions of each rack key nodes, to provide the reference for wind fram structure design. The results show that the displacement response of frame structure in the forced vibration of pulsating load mainly，accompanied by multi-stage resonant response modal participation. The peak displacement and root-mean-square distribution of the rack control point is similar，and along the focal axis response components are dominant，the vibration of frame mainly for the frame depending on the day part revolve around elevation angle axis.

导出引用

颜健，彭佑多，易陈斐. 碟式太阳能光热发电系统机架结构风振响应的时域分析[J]. 振动与冲击, 2016, 35(7): 177-185

YAN Jian，PENG You-duo，YI Cheng-fei. Time-domain analysis of wind-induced response of dish solar thermal power generation system rack structure[J]. Journal of Vibration and Shock, 2016, 35(7): 177-185

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