Vibration analysis of SL6 shiploader boom luffing winch platform

Boom luffing winch platform is located in empennage of SL6 shiploader at HUANGHUA PORT. The platform vibrated violently when the boom luffing lift and descend in high speeds during industrial process, which severely restricted the equipments productivity. To found out the vibration source of the platform, the boom luffing winch system dynamic model was been built, the influence of winch exposed gear meshing frequency to winch torques was been investigated. The results indicated that the response torque of winch pinion shaft enlarged with the raising of motor speed and the maximum response frequency left drifted, gradually closed to the exciting frequency. To research the influence of boom luffing winch system dynamic response to the vibration of the platform, ANSYS software is used to complete harmonic response analysis for boom luffing winch platform. The results indicate that the location of winch in the middle of the platform occurred vertical vibration under the 17.76 Hz exciting frequency which approached closely the high speed meshing frequency of winch exposed gears.