摘要
介绍基于局部加振方法监测结构健康状况的理论。依据这一理论对一组合T形钢梁试件进行试验,以旋松和取下翼缘与腹板连接螺栓模拟结构损伤,通过梁的加速度功率谱密度(PSD)总变化值,判断结构是否发生损伤,并确定损伤发生的位置。试验结果验证了这一理论及试验方法的有效性与可行性。
It is introduced the theory of structure health monitoring using local vibration excitation.Based on the theory,a test of a steel T-beam was do ne.The structure damage was imitated by releasing and taking away o ne o f the bolts that connect the web and flange of the beam.By the total change of a cceleration power spectral density between the intact and damaged case,the dama ge was successfully detected and its location was identified.From the test,i t was verified that the damage detection theory is effective and practica l.
出处
《钢结构》
2009年第4期19-22,共4页
Steel Construction
关键词
振动
功率谱密度
结构损伤
监测
vibration
power spectral density
structural damage
monitoring
