Simulation Experiment on Acoustic Emission Characteristics of Non-uniform Settlement and Corrosion of Tank Bottom
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摘要: 针对立式储罐不均匀沉降会造成储罐应力和底板腐蚀变化的问题，通过有限元模拟分析、沉降模拟试验以及声发射模拟腐蚀速率试验，研究了不均匀沉降条件下，储罐上的应力变化与腐蚀速率变化的规律以及声发射参数与腐蚀速率间的对应关系。结果表明：随着不均匀沉降面积的变化，储罐应力随之发生变化，底板的腐蚀速率也随之变化。同时，对应力和腐蚀速率的变化结果与声发射特征参量进行关联分析，得到了对腐蚀速率变化较为敏感的特征参量，为不均匀沉降下储罐的声发射检测提供了依据。Abstract: In view of the problem of the stress and corrosion of the bottom plate caused by the uneven settlement of the vertical storage tank, the influence of different liquid level and separate settlement area on the uneven settlement of the tank, the variation of stress and corrosion rate, the variety of acoustic emission parameters and the change of corrosion rate are studied by means of finite element simulation analysis, simulated settlement experiment and acoustic emission simulation corrosion rate experiment. The results show that with the evolution of the uneven settlement area, the stress and corrosion rate of the floor also changes. At the same time, the impact number of acoustic emission detection is also altered, further verify the feasibility of using acoustic emission technology to detect the change of corrosion rate of the floor.
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Keywords:
- uneven settlement /
- corrosion rate /
- acoustic emission
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