【摘要】 针对全隐框玻璃幕墙结构胶脱粘长度检测问题,率先提出了基于瞬态脉冲动力响应信号的FFT功率谱脱粘长度检测方法。通过对4个测点进行动力响应实验信号的采集,采用FFT功率谱对实验信号进行了分析评判,并提取功率谱主峰频率对信号总功率的贡献比重ηi作为结构胶损伤长度a的因变量。采用Gaussian函数和Lorentzian函数对实验数据进行了拟合,建立了ηi关于a的函数关系式,并对小损伤的a值进行了检测识别。研究成果表明,该方法有助于全隐框玻璃幕墙结构胶脱粘长度检测技术的推广和应用。更多还原

【Abstract】 The detection method based on FFT power spectrum of pulse transient dynamic response of structural silicone sealant damage in hidden frame supported glass curtain wall was first proposed in this paper.The dynamic response of experimental signal of four testing points was gathered and FFT power spectrum was used to analyze experimental signal.Power spectral main peak frequency of the signal in contributing proportion of the total power(ηi) was taken as a dependent variable of the structural silicone sealant damage length(a).Experimental data were fitted to establish a functional relations between ’a’ and ’ηi’ by Gaussian function or Lorentzian function,and the small damage value of ’a’was used to detected.Research results show that it will be help for the development,popularization and application of the structural silicone sealant damage detection technology in the hidden frame supported glass curtain wall.更多还原