【作者】 王显； 李雄彦； 王玮； 薛素铎；

【Author】 WANG Xian;LI Xiongyan;WANG Wei;XUE Suduo;College of Architecture and Civil Engineering, Beijing University of Technology;

【机构】 北京工业大学建筑工程学院；

【摘要】 针对某试验厂房复杂结构的动力特性开展现场测试研究,通过多阶段动态信号采集与分析方法对设备振动荷载特征识别与厂内传播规律进行研究。采用941B型传感器实时采集设备结构振动响应,通过模数转换完成数据采集,并对振动速度信号进行特征分析。信号的频域分析发现,环境激励的主频分布集中于0～20Hz频段,Z向速度响应峰值达0.0245m/s;设备运行激励主频则集中于21～24、50、72Hz及105Hz频段,测点B在72Hz处Z向速度达0.0808m/s。设备运行状态的振动特性决定了测试信号的频谱分布规律,此外环境噪声则对测试信号的显著性产生了一定影响。综合研究成果可为特殊设备支承结构的疲劳寿命评估提供实测数据支撑。更多还原

【Abstract】 We conducted on-site dynamic characteristic testing of a complex structure in an experimental workshop.Multi-phase dynamic signal acquisition and analysis methods were employed to investigate vibration load characteristics of equipment and their propagation patterns within the facility. The 941B sensors were utilized to collect structural vibration responses of equipment in real time, with data acquisition completed through analog-to-digital conversion,followed by characteristic analysis of vibration velocity signals. The frequency-domain analysis revealed that environmental excitation predominantly distributed in the 0～20Hz frequency range, with the peak Z-direction velocity response measured as 0.0245 m/s. Equipment operation excitation primarily concentrated in frequency bands of 21～24,50, 72Hz, and 105Hz, where measurement point B exhibited a Z-direction velocity of 0.0808 m/s at 72Hz. The vibration characteristics under equipment operating conditions were found to determine the spectral distribution patterns of test signals, while environmental noise was observed to influence the significance of measurement signals.The integrated research findings can provide empirical data support for fatigue life assessment of special equipment support structures.更多还原