Ensuring adequate tightening of bolted joints is necessary since they are more prone to corrosion in a harsh environment under insufficient preload. To this end, this paper first conducted an accelerated electrochemical corrosion experiment to expedite the corrosion process of bolted connections over different periods. The results show that as the corrosion time is extended, the overall dimensions of the bolt system remarkably decrease. Moreover, according to the mass loss of the bolted joints in 3.5% NaCl solution, the rate of corrosion continuously changes. Then, a real-time monitoring approach based on active sensing was utilized to evaluate the corrosion conditions of bolted joints. The stress wave generated by one piezoceramic transducer propagates through the bolted joints and is captured via another transducer that acts as a sensor. The energy corresponding to the stress wave signal declines during the corrosion process, and the normalized wavelet packet energy index is used to evaluate the degree of damage to the bolted joints. Overall, the health status of the bolted joints is significantly affected by the corrosion time. The proposed active sensing method can accurately monitor the corrosion process of bolted joints. The experimental results verify the feasibility and practicality of the real-time, piezoceramic transducer-enabled method for monitoring the structural health of corroded bolted joints.

确保螺栓连接足够紧固是必要的，因为在恶劣的预紧力不足的环境下，螺栓连接更容易受到腐蚀。为此，本文首先进行了加速电化学腐蚀实验，以加快螺栓连接在不同时期的腐蚀过程。结果表明，随着腐蚀时间的延长，螺栓系统的整体尺寸显着减小。此外，根据在3.5％NaCl溶液中螺栓连接的质量损失，腐蚀速率会连续变化。然后，基于主动感应的实时监测方法被用于评估螺栓连接的腐蚀状况。一个压电陶瓷换能器产生的应力波通过螺栓连接传播，并通过充当传感器的另一个换能器捕获。在腐蚀过程中，与应力波信号相对应的能量下降，并且使用归一化的小波包能量指数来评估螺栓连接的损伤程度。总体而言，螺栓连接的健康状况受腐蚀时间的影响很大。所提出的主动传感方法可以准确地监测螺栓连接的腐蚀过程。实验结果证明了实时，压电陶瓷换能器方法监测腐蚀的螺栓连接结构健康的可行性和实用性。螺栓连接的健康状况受腐蚀时间的影响很大。所提出的主动传感方法可以准确地监测螺栓连接的腐蚀过程。实验结果验证了实时，压电陶瓷换能器方法监测腐蚀的螺栓连接结构健康的可行性和实用性。螺栓连接的健康状况受腐蚀时间的影响很大。所提出的主动传感方法可以准确地监测螺栓连接的腐蚀过程。实验结果验证了实时，压电陶瓷换能器方法监测腐蚀的螺栓连接结构健康的可行性和实用性。