岸边起重机斜撑端部约束形式的改进对其共振风速的影响

岸边集装箱起重机的圆截面斜撑杆很容易发生风致振动，其中横风向振动的主要形式为涡激振动。其共振风速和杆件自身的自振频率有很大关系。笔者主要分析计算了岸边集装箱起重机的圆截面斜撑杆在理想状态、实际使用状态及改进约束形式后的自振频率与相应的共振风速，通过对比不同约束状态下的自振频率及共振风速的变化情况得出结论，该结论可供实际设计时参考。

The effect of restriction improvement on the resonant velocity of wind of the round-section bar in quayside container crane

The bars with round - section of quayside container crane can be easily vibrated by wind flow, vortex - vibration is the main transverse vibration. The wind speed which can cause the bar resonant vibration has a strong relation with the self- vibration frequency of the bar. In this paper, I compute the self - vibration frequency of the bar in three situation which indude the theory state, the practical state and the state with the improved restriction. Then I made some conclusion after I compare the self- vibration frequency in different situation, and these conclusion maybe some useful for practical design.