Study on the Natural Frequency Characteristics of Lift Gate Vibration Based on Added Mass Model

摘要

The dynamic characteristics of plane lift gate are analyzed based on the model of added mass arising from flow field which is induced by gate vibration in static water. The effect of added mass caused by fluid-solid coupling on gate natural frequency is considered. The natural frequency characteristics of plane gate with or without water and at different opening, different water head is investigated. The numerical simulating results show that effect of added water mass on the gate dynamic characteristics is greatly and leads to significantly lower natural frequency than the gate without water. The larger the gate opening is, the higher the natural frequency of gate vibration is. When the upstream or downstream head of gate is increased, the natural frequency will decrease.