| 蒋田勇*,彭中,罗舟滔,郑俊博.基于阻抗法的预应力波纹管密实性试验研究[J].实验力学,2017,32(4):495~505 |
| 基于阻抗法的预应力波纹管密实性试验研究 |
| Experimental Study of Prestressed Bellows Compactness Based on Electro-Mechanical Impedance (EMI) Method |
| 投稿时间：2016-08-16 修订日期：2016-10-08 |
| DOI：10.7520/1001-4888-16-150 |
| 中文关键词: 压电陶瓷 机电阻抗法 波纹管 密实性指标 |
| 英文关键词:piezoelectric ceramic electro-mechanical impedance method bellows compactness index |
| 基金项目:国家自然科学基金资助项目(51208061);长沙理工大学土木工程优势特色重点学科创新性项目(15ZDXK12) |
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| 中文摘要: |
| 针对预应力波纹管中压浆不密实的问题,提出了一种基于压电阻抗法的预应力波纹管密实性检测研究方法。运用压电阻抗法的结构健康监测原理,定义了预应力波纹管灌浆密实性指标的均方根偏差RMSD(Root Mean Square Deviation),通过测试粘贴在波纹管底顶板的压电陶瓷传感器PZT(Piezoelectric Ceramic Transducer)和嵌入到波纹管内部的智能骨料SA(Smart Aggregate)的电阻抗值,与灌浆100%工况相比研究了灌浆0%、灌浆50%以及灌浆90%等工况下的电阻抗实部与虚部的频谱曲线变化规律。结论是密实性指标RMSD随预应力波纹管密实性增加而减小。上述研究成果验证了阻抗法对波纹管密实性检测的有效性。 |
| 英文摘要: |
| In order to solve the problem that is the slurry in prestressed bellows dense enough, a new method is proposed in this paper to detect the compactness of prestressed bellows, based on electro-mechanical impedance method. Adopting structure health monitoring principle of piezoelectric impedance method, the root mean square deviation (RMSD) is defined as index describing the compactness of slurry in prestressed bellows. The electro-mechanical impedance was measured by using piezoelectric ceramic transducers (PCT), which are mounted on bellows bottom, and smart aggregates (SA), which are embedded into the bellows. The variation of frequency spectrum curves of electrical resistance real part and imaginary part was studied under the condition of grouting in 0%, in 50% and in 90% respectively, and was compared with that of grouting in 100%. Conclusion is that the compactness index RMSD decreases with the increase of prestressed bellows density. Above results verify the validity of Electro-mechanical impedance method in bellows compactness detection. |
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