【摘要】 输电塔线体系是国家的重要生命线工程,在此类结构中,节点是用螺栓联结的,由于螺栓在长期的风致振动中会产生脱落损伤,为了确保人民的生命财产安全,开展对输电塔架结构节点螺栓脱落损伤的诊断研究十分必要。针对高耸塔架结构节点损伤的特点,建立了具有螺栓脱落损伤的塔架结构的有限元模型,提出了基于改进遗传算法的节点螺栓脱落的损伤位置和程度的识别方法;最后,通过对一实际大跨越塔架结构的数值仿真分析,表明文中提出的损伤诊断方法的结果是令人满意的。更多还原

【Abstract】 In this paper,established the finite element model of joint-damaged structure based on the damaging characteristic of high-rising steel tower structure.Parameters identification approach of Improved Genetic Algorithms is presented,the structural damage detection and determined damage extent are performed by IGAs.The numerical example of high-rising steel tower is utilized to demonstrate the effectiveness of the proposed approach.更多还原