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汤兆光, 王永志, 孙锐, 段雪锋, 王体强, 王浩然. 动力离心试验微型孔压传感器研制与性能验证[J]. 岩土工程学报, 2020, 42(S2): 129-134. DOI: 10.11779/CJGE2020S2023
引用本文: 汤兆光, 王永志, 孙锐, 段雪锋, 王体强, 王浩然. 动力离心试验微型孔压传感器研制与性能验证[J]. 岩土工程学报, 2020, 42(S2): 129-134. DOI: 10.11779/CJGE2020S2023
TANG Zhao-guang, WANG Yong-zhi, SUN Rui, DUAN Xue-feng, WANG Ti-qiang, WANG Hao-ran. Development and performance verification of miniature pore water pressure transducer for dynamic centrifuge modeling[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S2): 129-134. DOI: 10.11779/CJGE2020S2023
Citation: TANG Zhao-guang, WANG Yong-zhi, SUN Rui, DUAN Xue-feng, WANG Ti-qiang, WANG Hao-ran. Development and performance verification of miniature pore water pressure transducer for dynamic centrifuge modeling[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S2): 129-134. DOI: 10.11779/CJGE2020S2023

动力离心试验微型孔压传感器研制与性能验证

Development and performance verification of miniature pore water pressure transducer for dynamic centrifuge modeling

  • 摘要: 微型孔压传感器是土工离心模型试验的重要量测工具之一,而以往国产与进口传感器相比,在响应精度、频响范围、使用寿命等方面仍存在较大差距。介绍了一种自主研发的国产DSP-I微型孔压传感器,通过多组静力、动力离心试验及与国际代表性PDCR-81传感器测试结果对比,验证了新型传感器的响应精度与稳定性能。结果表明:5g~50g静力试验中每对DSP-I和PDCR-81传感器测试结果高度一致,两者误差均≤1%;不同幅值正弦、地震等荷载连续输入下,每对传感器动力测试结果高度吻合,相关系数R2均≥0.9922。试验证明了国产DSP-I微型孔压传感器具有良好响应精度和稳定性能,可替代国际公认标准孔压传感器且成本优势显著,为我国动力离心试验技术发展提供强有力支撑。

     

    Abstract: The miniature pore water pressure transducer is one of the key measurement tools in the geotechnical centrifuge model tests. Compared with the imported transducers, the domestic transducers still have a great distance in response accuracy, frequency response range, service life, etc. The DSP-I miniature transducer for pore water pressure is proposed. Moreover, the PDCR-81 of internationally widespread transducers and the DSP-I transducers are selected to perform a series of comparative tests in static and dynamic centrifuge models, and the response accuracy and stability performance of the novel DSP-I transducer are verified. The results show: (1) The measurement results of DSP-I and PDCR-81 transducers are highly consistent in the static centrifuge model tests with spin up 5g to 50g, and their error is less than or equal to 1%. (2) The test results of each pair of transducers are highly consistent under the continuous input of sine waves, seismic waves with different amplitudes and other dynamic loads, and their correlation coefficient is more than or equal to 0.9922. From these tests it is proved that the DSP-I of domestic miniature pore water pressure transducers have good response accuracy and stability performance and can replace internationally recognized standard miniature pore water pressure transducers and have significant cost advantage, which provides power support for the development level of dynamic centrifuge test technology in China.

     

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