基于小波变换的风荷载作用下格构式塔架损伤识别

THE DAMAGE IDENTIFICATION OF LATTICE TOWER UNDER THE WIND LOAD ACTION BASED ON WAVELET TRANSFORM

风荷载作用下塔架结构将产生复杂的弯扭联合变形,格构式塔架中各杆件的受力变化对整体结构的影响存在较大差异,因而对结构损伤位置动力响应信息的拾取存在较大的影响。以某通讯塔结构为例,以风荷载作为环境激励,通过结构动力响应分析信息,应用小波变换进行结构损伤状态识别,对垂直于外荷载平面上格构式塔架腹杆损伤识别可靠性进行分析。

The tower structure would have a combined bending and torsion deformation under wind load,because the affect of each tower bar force on the structure is quite different,there is a greater impact on pickup of the damage information to the dynamic response of structure.The damage status of a communications tower structure was identified using the wind load as environmental incentives,through the information analysis of the structure dynamic response.Through the example analysis,the problem was found that the damage could not be detected when the load was on the verticalplane.