摘要
采用杆的模型推导出桅杆底部船体结构扭转刚度与桅杆一阶扭转固有频率之间的关系,用船体结构的扭转刚度kα和桅杆参数k′GJ/l的比值判断船体结构对桅杆一阶扭转固有频率的影响。并且用施加不同扭转刚度的办法得到了一个很难识别一阶扭转振动模态的桅杆的一阶扭转频率。
The connection between torsional stiffness of the structure in the bottom of the mizenmast and the first mode of the mizenmast is deduced.And the affection between the ship structure and the first mode of the mizenmast is(achieved) by utilyzing the ratio of the torsional stiffness k_α to the parameter of mizenmast.k′GJ/l.Such mode of a(mizenmast),which is very difficult to be identified by conventional approach,has been recognized through adding different torsional stiffnesses to the model.
出处
《振动与冲击》
EI
CSCD
北大核心
2006年第1期156-158,共3页
Journal of Vibration and Shock
关键词
桅杆
振动
局部振动
扭转振动
mizenmast,vibration,local vibration,torsional vibration
