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提出了一种适用于轻质高强梁结构的损伤识别方法。针对附加质量的频率灵敏度方法在轻质高强梁结构损伤检测中出现的定位干扰问题,将结构的模态振型与应变能相结合,提出一种可利用结构应变能排除损伤定位干扰的损伤识别方法,并分别进行了数值仿真和实验验证。结果表明,该方法兼具了附加质量频率灵敏度法和应变能法在损伤识别中的优点,可以较为精准地识别轻质高强梁结构中的损伤位置和损伤程度。
A damage identification method suitable for lightweight high-strength beam structure is proposed. Aiming at the localization disturbance appearing in the damage detection of lightweight high-strength beam structure based on the frequency sensitivity method of additional mass, the modal vibration mode and strain energy of the structure are combined to propose a damage identification method that can eliminate the damage localization disturbance using structural strain energy Method, respectively, and numerical simulation and experimental verification. The results show that this method combines the advantages of the additional mass frequency sensitivity method and the strain energy method in damage identification and can identify the damage location and degree of damage in the lightweight high-strength beam structure more accurately.