摘要
基于弹性杆件的纵向振动理论,研究基桩简化模型的损伤识别方法。用弹簧代替损伤的自由-弹性支承杆的损伤材料,通过分析位移导纳,建立损伤截面的刚度、损伤位置和杆件固有频率之间的函数关系,利用不同的损伤模态频率实现对自由-弹性支承杆的损伤进行定位和损伤程度的判断。数值模拟给出了很好的损伤识别结果。
In this paper, spring is used to replace the damage part of beam. Based on the theory of (longitudinal) vibration, the free-spring beam with one damage is studied. The changes of frequence and stiffeness between the damage and intact beam is adopted to locate and qualify damage, then the equation of (receptance) is gained proving that the stiffness is the function of frequence and location of damage. Given the same damage, stiffness is a constant. So the different modes curves will pass the same point and the damage can be identified. The results of numerical simulation show that the method is (viable) in civil engineering.
出处
《长沙交通学院学报》
2003年第4期6-9,共4页
Journal of Changsha Communications University
