曲率模态常用于计算结构动强度设计中的应力状态。针对桥梁等承弯结构研究曲率模态与应变模态之间的关系 ,阐明了曲率模态分析的理论依据及其特性 ,如曲率模态的正交性和叠加性等 ;推导了有关公式并据以说明曲率模态试验方法和参数识别 ;探讨了曲率模态在动强度设计、结构损伤检测等方面的应用。由于曲率模态是结构的中性面的变形模态 ,它对结构的局部变化与应变有相同的敏感性 ,但其模态表达式将比应变模态简单 ,而应变与曲率之间有简单的关系 ,因此曲率模态在动态设计应用上将更为方便 Curvature modes are often used to calculate the stress state in the design of structural dynamic strength. Aiming at the relationship between curvature mode and strain mode of bridge structure, the theoretical basis and characteristics of curvature mode analysis are expounded, such as the orthogonality and superposition of curvature mode, etc. The curvature modal test method and parameter identification are described. The application of curvature modal in dynamic strength design and structural damage detection is discussed. Because the curvature mode is the deformation mode of the neutral plane of the structure, it has the same sensitivity to local changes and strains of the structure. However, the modal expression will be simpler than the strain mode, and there is a simple relationship between the strain and the curvature The relationship between the curvature mode in dynamic design applications will be more convenient