大型门座起重机振动模态测试技术探讨

Research on Vibration Testing of Large Portal Cranes

门座起重机作为港口重要的起重运输设备,由于其在潮湿、腐蚀性较大的环境中频繁工作,负荷变化大,且服役时间较长,使得金属结构的振动问题日益突出,非常有必要对金属结构进行振动模态测试分析。本文基于加速度传感脉冲击振测试技术,对某港口MQ1030门座起重机转台平面进行振动测试,并对测试信号进行互功率谱处理,得出转台平面振动模态参数,为该起重机金属结构动态安全评估提供了参考依据。

The portal cranes is a port important lifting transportation equipment. Due to moist, corrosive environment, the vibration problems of the metal structure become increasingly prominent. It is necessary to do metal structural vibration modal testing analysis. With a vibration acceleration sensor on a port MQ1030 portal cranes turntable plane, and using signal processing for cross-power spectrum, the test results obtain turntable plane vibration modal parameters and provide a crane dynamic security assessment of metal structure.