【摘要】 通过分析传统的应变模态方法,并在此基础上采用应变模态曲率差指标对一悬臂梁进行了损伤识别,发现该方法受到振型求解以及激励力的影响,识别效果不理想。所以对基于应变能量的损伤识别指标开展研究,发现该指标能够在不受激励力的影响下,避开复杂的振型求解,并通过提出的放大系数k对识别结果进行后处理,较好地提高了损伤识别效果。更多还原

【Abstract】 Based on the method of the time-history data of strain,the damage identification of a cantilever beam is studied in this paper. By using the method of strain mode curvature difference,this index is affected by vibration mode and exciting force and can’t satisfy the request of damage identification. By using the energy method based on strain which is identified to avoid the effect of vibration mode and exciting force,the effect of the damage identification has been greatly improved,especially after amplifying processing with a magnification factors k which is proposed in this paper.更多还原