【摘要】 针对季冻区环境的特殊性,即夏季温度较高、空气湿度大,冬季温度低、空气较干燥,年温差极大等特点,设计了一种桥梁监测预警装置。该装置以频率的损伤识别理论为基础,运用了转化思想将环境因素对桥梁健康状况的影响等价为相应频率损伤,以此来判定环境变化对桥梁造成的积累性损伤,结合桥梁结构损伤所引起的模态频率变化对桥梁健康状态进行一个综合判断。该装置利用无线传输,提高了参数采集过程的效率,实现了预警装置的无线化。最后对该装置进行了可行性的验证,达到了预期效果。更多还原

【Abstract】 In this paper, a kind of bridge monitoring and warning device for special characteristics of the environment of the frozen season area(i.e. The high temperature in summer, the humidity of air, the low winter temperature, the dry air and the large annual temperature difference) was designed. Based on the theory of damage identification, the device was designed to judge the accumulated damage to the bridge caused by the environmental change by changing the influence of environmental factors on the health status of the bridge into the corresponding frequency damage and combining with the modal frequency caused by the damage of the bridge structure Which improves the efficiency of the parameter acquisition process and realizes the wirelessization of the early warning device. Finally, the feasibility of the device was verified and the desired result was achieved.更多还原