Finite-Element Analysis of Noise Preceding the Arrival of S-Wave in Ultrasonic Measurements of Rock Velocities

Huang, Xinjian; Di, Bangrang; Wei, Jianxin; Shuai, Da; He, Lingyi

doi:10.1109/tuffc.2020.3011958

Cited by 5 publications

(1 citation statement)

References 50 publications

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“…The calculation is shown in Fig. 1 [13][14][15]. The calculation of the VNF of irregular building structure using Ansys software requires first constructing a three-dimensional modeling of the building structure.…”

Section: Estimation Of Vnf Of Irregular Building Structure Based On F...mentioning

confidence: 99%

Research on estimation and control methods of natural frequency of irregular building structure vibration

Song

2024

J. vibroeng.

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With the continuous increase in the number of irregular buildings, ensuring the safety of building structures has become the primary concern. The study used finite element analysis to estimate the natural frequency of vibration of irregular building structures, and further designed a fuzzy control algorithm combined with magnetorheological dampers to improve their seismic performance. The research results showed that the longitudinal and transverse natural frequencies of Model 1 were 10.44 Hz and 10.51 Hz, respectively, while those of Model 2 were 10.31 Hz and 9.89 Hz, respectively. Using the fuzzy control method, the peak displacement of the building structure was reduced to 11.64 cm, and the peak acceleration was 7.9 m/s2. Comparing the open-plus-closed-loop control with open-loop control methods, it was found that although the fluctuation amplitude of the open-loop control method was relatively large, its control effect was poor, while the open-plus-closed-loop control methods had good overall control effect, with the peak acceleration of 8.26 m/s2 in the open-loop control. The study provides an accurate method for estimating the natural vibration frequency of irregular building structures and demonstrates the effectiveness of the designed fuzzy control algorithm in controlling building vibration.

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Section: Estimation Of Vnf Of Irregular Building Structure Based On F...mentioning

confidence: 99%

Research on estimation and control methods of natural frequency of irregular building structure vibration

Song

2024

J. vibroeng.

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DEM Analysis of the P-Wave Anisotropy Response to the Microstructure of Sedimentary Rock Under Biaxial Compression

Zheng,

Zhang,

Liu

et al. 2024

Rock Mech Rock Eng

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Numerical simulation of P and S wave propagation in porous and low porosity carbonate rocks: laboratory tests, automatic P and S waves detection and FLAC3D simulation

Besharatinezhad,

Török

2024

Bull Eng Geol Environ

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This study presents laboratory measurements of P and S wave velocities of two carbonate rocks (porous limestone and yellow cemented limestone). The experimental results were validated and compared with the numerical simulation outputs using the 3D Fast Lagrangian Analysis of Continua software (FLAC3D). The main aim of this study is to evaluate the effect of frequency and mode of emission on ultrasonic pulse velocity (UPV) by applying an automatic method for the determination of P and S wave velocities. Based on the results, automatic detection of UPV can provide reliable outputs. The difference between numerical simulation results and laboratory measurement in terms of P and S wave velocities was, on average, around 7%, suggesting the applicability of the automatic detection method. Our study implies less noise in the perfect shear (PS) mode than in the single zone (SZ) emission mode. In summary, higher frequencies and the PS mode of emission are recommended.

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Finite-Element Analysis of Noise Preceding the Arrival of S-Wave in Ultrasonic Measurements of Rock Velocities

Cited by 5 publications

References 50 publications

Research on estimation and control methods of natural frequency of irregular building structure vibration

Research on estimation and control methods of natural frequency of irregular building structure vibration

DEM Analysis of the P-Wave Anisotropy Response to the Microstructure of Sedimentary Rock Under Biaxial Compression

Numerical simulation of P and S wave propagation in porous and low porosity carbonate rocks: laboratory tests, automatic P and S waves detection and FLAC3D simulation

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