基于结构损伤后残余力向量的计算 ,对连续梁进行损伤诊断研究 ,并根据灵敏度分析来考虑结构物理参数误差对诊断结果的影响 .数值模拟结果表明 ,结构存在一定损伤时 ,基于残余力向量法对连续梁结构的损伤诊断非常有效 ,当结构物理参数有一定的噪声污染时 ,仍能给出比较准确的诊断结果 . Based on the calculation of residual force vector after structural damage, the damage diagnosis of continuous beam is studied, and the influence of structural physical parameter error on the diagnosis result is considered based on the sensitivity analysis.The numerical simulation results show that when the structure has some damage, It is very effective to diagnose the damage of the continuous beam structure. When the physical parameters of the structure have some noise pollution, it can still give a more accurate diagnosis result.