摘要
基于振动诊断方法,将修正的线弹簧模型引入到铁木辛柯梁传递矩阵法中,计算出梁损伤前后的振动信息。利用振动信息,提出振型差值曲率方法,来诊断梁的裂纹位置和裂纹深度,研究证明,此方法可供梁的裂纹诊断参考。
Plate, beam are the basic components of the offshore platform. If they occur to have some cracks, it will lead to the accident of offshore platform. Beam＇s stiffness will change due to the appearance of the cracks. Therefore, based on the vibration diagnosing method, this paper applies the line-spring model to the Timoshenko beam transfer matrix method for the first time in order to calculate the vibration information of beam before or after the damages. By using the vibration information, this paper puts forward the vibration-margin curvature method to diagnose the position and depth of beam cracks, and studies have shown that this method is feasible for the diagnosis of beam cracks to refer.
出处
《中国海洋平台》
2007年第2期28-31,36,共5页
China offshore Platform
基金
国家自然科学基金(50479060)
关键词
结构振动
传递矩阵
裂纹诊断
structure vibration
transfer matrix method
crack diagnosis
