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Comparative analysis of thermodynamic and mechanical responses between underground hydrogen storage and compressed air energy storage in lined rock caverns

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International Journal of Mining Science and Technology 2024年第4期34卷 531-543页

作者： Bowen Hu Liyuan Yu Xianzhen Mi Fei Xu Shuchen Li Wei Li Chao Wei Tao Zhang State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China Key Laboratory of Large Structure Health Monitoring and Control Shijiazhuang Tiedao UniversityShijiazhuang 050043China School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou 221116China

Underground hydrogen storage(UHS)and compressed air energy storage(CAES)are two viable largescale energy storage technologies for mitigating the intermittency of wind and solar ***,it is meaningful to compare the properties of hydrogen and air with typical thermodynamic storage *** study employs a multi-physical coupling model to compare the operations of CAES and UHS,integrating gas thermodynamics within caverns,thermal conduction,and mechanical deformation around rock *** thermodynamic responses are validated using additional simulations and the field test *** and pressure variations of air and hydrogen within rock caverns exhibit similarities under both adiabatic and diabatic simulation *** reaches higher temperature and pressure following gas charging stage compared to air,and the ideal gas assumption may lead to overestimation of gas temperature and *** steel lining of CAES,the sealing layer(fibre-reinforced plastic FRP)in UHS is prone to deformation but can effectively mitigates stress in the sealing *** CAES,the first principal stress on the surface of the sealing layer and concrete lining is tensile stress,whereas UHS exhibits compressive stress in the same *** present research can provide references for the selection of energy storage methods.

关键词： Underground hydrogen storage Compressed air energy storage Mechanical response Thermodynamic response Lined rock caverns

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Experimental study on wind pressure distribution and wind-induced interference effects on long-span spherical structure

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Jianzhu Jiegou Xuebao/Journal of Building structures 2016年第10期37卷 140-146页

作者： Liu, Qingkuan Lu, Zhaoliang Zheng, Yunfei Ma, Wenyong Liu, Xiaobing Structural Health Monitoring and Control Institute Shijiazhuang Tiedao University Shijiazhuang050043 China Key Laboratory for Structure Health Monitoring and Control in Hebei Province Shijiazhuang050043 China School of Civil Engineering Shijiazhuang Tiedao University Shijiazhuang050043 China

Spherical shell structure is very sensitive to wind loads. The wind load is one of the most important loads in structural design. By wind tunnel tests, simultaneous multi-pressure measurement on surface of spherical shell structure was carried out under different conditions to study the characteristics of wind load distribution and wind-induced interference effects. Results show that opened and closed sunroofs have significant effect on wind pressure distribution on the outer surface of the structure in partial region, especially, leeward side. For the inner surface of the structure, wind pressure become small when sunroof is closed, which is safe for the outer structure. Coal dump has no effect on wind pressure distribution along wind direction, while in cross wind direction it has effect. Different relative positions of adjacent structures have certain influence on wind-induced interference effects and different regions have different effects. © 2016, Editorial Office of Journal of Building structures. All right reserved.

关键词： Wind stress

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Study on Influence of Crack on the Blade Status Using FBGs

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Photonic Sensors 2018年第1期8卷 63-69页

作者： Gang XU Lei LIANG Jianzhi LI Huaping MEI Hongli LI Yijun LIU National Engineering Laboratory of Fiber Optic Sensing Technology Wuhan University of Technology Wuhan 430070 China The Key Laboratory for Health Monitoring and Control of Large Structures Shijiazhuang 050043 China School of Mechanical Engineering Hubei Engineering University Xiaogan 432000 China

The status detection for rotating parts is difficult since the sensor is influenced by the rotation in the inflammable, explosive, and strong magnetic environment. Based on the fiber Bragg grating sensing technology, this paper studies the influence of the natural frequency and deformation of a rotor blade affected by the size of crack in the blade. Test results show that the speed of the equipment and blade excited vibration frequency are two main factors or deformation and vibration frequency of the blade. With an increase in the crack depth, the blade deformation is increased while the stimulated natural frequency of the blade is decreased; at a low rotational speed, the deformation is mainly caused by the rotating speed of the blade. On the contrary, the vibration blade itself contributes to the deformation at a high speed. During the process of full speed rotation, the influence of the rotational speed on the blade deformation almost remains the same, and the influence of the natural vibration on blade deformation is increased with an increase in the rotational speed.

关键词： Rotor blade fiber Bragg grating crack depth rotational speed blade frequency blade deformation

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structure crack monitoring based on long-gauge FBG sensor 2nd

Structure crack monitoring based on long-gauge FBG sensor

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2nd International Conference of Structural health monitoring and Integrity Management, ICSHMIM 2014

作者： Zhang, Wentao Li, Fang Lin, Huang Ce, Bian Xu, Hongbin Du, Yanliang Optoelectronic System Laboratory Institute of Semiconductors Chinese Academy of Sciences Beijing China Graduate School of Shijiazhuang Tiedao University Shijiazhuang China Key Lab of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Tiedao University Shijiazhuang China

ISBN: (纸本)9781138027763

Crack detection is very important for long-term large-scale structural health monitoring (SHM). Fiber optic sensor has been approved to have good performance in application in SHM. In this paper, we present a novel method to monitor the crack by using long-gauge FBG sensor. A FBG with a gauge length of 50 mm is fabricated. When the crack pass through the FBG, the reflect spectrum of FBG will be expanded or chipped. Different position of the crack will result in different shape of the spectrum. By analyzing the characteristics of the spectrum, the position of the crack can be detected and the opening width of the crack can be estimated. © 2015 Taylor & Francis Group, London.

关键词： Structural health monitoring

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Main structure Design and Constructional Safety control of large-span Gravel Surrounding-Rock Tunnel

Main Structure Design and Constructional Safety Control of L...

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作者： Li De-kang Li Hao-ran OuYang Zuo-lin Yue Zhi-guo Dong Yan-dong Structural Health Monitoring and Control Institute Shijiazhuang Tiedao University The Key Laboratory for Health Monitoring and Control of Large Structures Shijiazhuang Tiedao University Shuohuang Railway Development Limited Liability Company

As the construction of large-span gravel surrounding-rock tunnel is very difficult which has serious security risks,it is significant to choose a set of reasonable structure design methods and safety control *** paper taked a large-span gravel road tunnel in Jinan Expressway as an *** combining theoretical analysis with numerical simulation,the main structure design process of the large-span IV level surrounding-rock tunnel was divided into four steps,meanwhile concrete measure basis and testing methods were *** to the engineering geological conditions and the structure design schemes,the construction schemes and monitoring measurement projects of large-span gravel surrounding-rock tunnel were determined to ensure the safety of tunnel *** paper provides a complete example scheme for the design and construction of the main structure of the large-span IV class surrounding-rock tunnel,which provides a reference for similar projects in the future.

关键词： IOP Main structure Design and Constructional Safety control of large-span Gravel Surrounding-Rock Tunnel

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Distributed feedback fiber laser rosette for acoustic emission detection

Distributed feedback fiber laser rosette for acoustic emissi...

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2nd International Conference on Materials Engineering and Automatic control, ICMEAC 2013

作者： Huang, Wen Zhu Zhang, Wen Tao Ma, Huai Xiang Li, Fang Du, Yan Liang School of Mechanical Engineering Shijiazhuang Tiedao University Shijiazhuang China Optoelectronic System Laboratory Institute of Semiconductors Chinese Academy of Sciences Beijing China Key Lab. of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Tiedao University Shijiazhuang China

ISBN: (纸本)9783037857250

This study aims at providing a practical method in large structure health monitoring. A novel fiber optic rosette based on distributed feedback (DFB) fiber laser for acoustic emission (AE) detection and location is presented. The ultra-narrow line width of the DFB fiber laser will result in high resolution in AE wave detection using a fiber optic interferometric demodulation method. The directivity of the fiber optic rosette is investigated. A rosette with three DFB fiber lasers is tested in the experiment to determine the direction of propagation of AE waves. © (2013) Trans Tech Publications, Switzerland.

关键词： Fiber lasers

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TBM rock mass classification using XGBoost and Interpretable Machine learning

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Advanced Engineering Informatics 2025年 66卷

作者： Yaoqi Nie Qian Zhang Lili Hou Lijie Du Xiaolong Zhao Yujie Xue ZhiCheng Lin Xiuxiu Cao Zixin Wang School of Safety Engineering and Emergency Management Shijiazhuang Tiedao University Shijiazhuang 050043 China Key Laboratory of Structure Health Monitoring and Control Shijiazhuang Tiedao University Shijiazhuang 050043 China School of Engineering Nagasaki University Nagasaki 852-8521 Japan School of Information Science and Technology Shijiazhuang Tiedao University Shijiazhuang 050043 China School of Civil Engineering Shijiazhuang Tiedao University Shijiazhuang 050043 Hebei China School of Civil Engineering Beijing Jiaotong University No. 3 of Shangyuancun Haidian District Beijing 100044 China

Accurate classification of surrounding rock grades during Tunnel Boring Machine (TBM) operations is essential for optimizing excavation parameters and ensuring construction safety. However, traditional classification methods face challenges, particularly in adapting to complex geological conditions and achieving high efficiency in model optimization. To address these issues, this study proposes an identification methodology based on the COA-XGBoost framework. Initially, raw data is preprocessed to eliminate anomalous instances, such as those arising from equipment malfunctions or maintenance activities, using a state discrimination function. To better capture the interaction dynamics between the TBM and the surrounding rock, a novel feature parameter, specific energy, is introduced. The Relief algorithm is employed to evaluate feature importance and assign weights to TBM operational parameters, amplifying the role of critical features while minimizing interference from redundant ones. Subsequently, the Coati Optimization Algorithm (COA) is integrated with the XGBoost classifier, enabling global parameter optimization and enhancing the model’s performance. The proposed method was validated using data from the water conveyance tunnel section of the Yinchuojiliao Project. Results demonstrate that the Relief algorithm effectively enhances the model’s ability to identify critical parameters through feature weighting. The COA-optimized XGBoost model achieves a significant improvement in recognition accuracy compared to traditional approaches, with accuracy gains of approximately 8%, particularly excelling under complex geological conditions such as Class IV and Class V surrounding rocks. The final model achieves an accuracy of 91.5%, with recall and F1 scores reaching 91.5% and 91.4%, respectively. Additionally, five-fold cross-validation highlights the model’s robustness and generalization capabilities. Furthermore, a SHAP-based interpretability analysis clarifies the re

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THE INTERNAL CRACK IN PIEZOELECTRICPIEZOMAGNETIC SANDWICHED structure UNDER IN-PLANE COUPLE LOADING

THE INTERNAL CRACK IN PIEZOELECTRICPIEZOMAGNETIC SANDWICHED ...

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2016年全国压电和声波理论及器件应用研讨会

作者： Xing ZHAO Jin-xi LIU Zheng-hua QIAN Department of Engineering Mechanics/The Key Laboratory for Health Monitoring and Control of Large Structures Shijiazhuang Tiedao University State Key Laboratory of Mechanics and Control of Mechanical Structures/College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics

Background, Motivation and Objective The piezoelectric-piezomagnetic(PE-PM) sandwiched structures are consisted of layered piezoelectric and piezomagnetic materials. They are easy to be manufactured and possess superior magnetoelectric(ME) coupling effect. With these superiorities, the PE-PM sandwiched structures have been widely used in sensors, transducers and acoustic wave devices and so on. However, due to the fragility of the materials and complicated in-service loading conditions, the PE-PM sandwiched structures tend to fracture easily. So, it is essential to research the internal crack in PE-PM sandwiched structures under electro-magneto-mechanical coupled loadings. However, up until now, there is no paper studies the mode-I crack in PE-PM-PE sandwiched structure under in-plane electro-mechanical coupled loading. From the above, considering the magnetic field of piezoelectric material and the electric field of piezomagnetic material, a mode-I internal crack problem of a PM layer bonded to two PE layers is studied in this paper. Statement of Contribution/Methods This paper contributes to obtaining an analytical solution by using the integral transform technique. Firstly, the Fourier transforms are applied to the governing equations, and a set of appropriate solutions are obtained with some unknown functions. Then, substituting the appropriate solutions into boundary conditions meanwhile considering the magnetoelectric permeable crack plane conditions, we could derive the dual integral equations after the complex mathematical process. In order to obtain the magneto-electro-elastic field in the near of the crack tip, the dual integral equations are reduced into the singular integral equations with Cauchy kernel of the second kind. Finally, the Cauchy singular integral equations will be solved by Gauss-Jacobi collocation method. Meanwhile, the field intensity factors(FIFs) could be obtained. Results In this paper, an integral transform technique is employed to re

关键词： Mode I crack Piezoelectric-piezomagnetic sandwiched structure Field intensity factors Cauchy singular integral equation

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Mechanical and Failure Characteristics of Shear keys on Immersed Tunnel Segment Joints under Differential Settlements

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Procedia Engineering 2016年 166卷 373-378页

作者： Zhi-nan Hu Yong-li Xie School of Civil Engineering Shijiazhuang Tiedao University Shijiazhuang 050043 China The Key Laboratory for Health Monitoring and Control of Large Structures Shijiazhuang 050043 China College of Highway Chang’an University Xi’an 710064 China

In order to research mechanical and failure characteristics of shear keys on immersed tunnel segment joints, a 1:4.69 large scale immersed tunnel physical model test was conducted on a settlement platform. Bending and twisting working conditions of segment joints caused by uneven settlements and uneven back-silting were simulated, by means of controlling the lifting jacks under the settlement platform. Simultaneously, a 3-D numerical simulation which considered the nonlinearity of rubber pads and contacting effects between segment joints was carried out. The results shows that vertical shear keys have main contribution to resist expansion of segment joints in bending condition, and vertical shear keys on the soft layer have larger shear forces than that on the hard layer. In addition, shear stresses were mainly concentrated at the terminal corners and connecting corners between shear keys and segments. Correspondingly, at the terminal corners and connecting corners between shear key and segments appeared 30° ∼60° and 45° extending cracks respectively. At last, some structural strengthen suggestions on shear keys were offered for immersed tunnel design.

关键词： Immersed tunnel Segment joints Shear keys Failure characteristics Differential settlements

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Evolution Law of Frost-Heaving Pressure of Frozen Circles in Surrounding Rock around Water-Rich Tunnels in Cold Regions

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Zhongguo Gonglu Xuebao/China Journal of Highway and Transport 2022年第9期35卷 340-351页

作者： Zheng, Xin-Yu Xu, Fei Sun, Hao-Kai Gao, Yang Wei, Li-Yuan Geotechnical and Structural Engineering Research Center Shandong University Shandong Jinan250061 China Key Laboratory of Large Structure Health Monitoring and Control Shijiazhuang Tiedao University Hebei Shijiazhuang050043 China State Key Laboratory for Geomechanics & Deep Underground Engineering China University of Mining and Technology Jiangsu Xuzhou221116 China School of Civil Engineering Southwest Jiaotong University Sichuan Chengdu610031 China

The frost-heaving evolution mechanism of frozen circles in surrounding rock around water-rich tunnel is a key scientific problem that affects the operation safety in cold regions. To explore the evolution law of frost-heaving pressure in frozen circles in such surrounding rock, scaled three-dimensional geomechanical model tests were carried out. In these tests, freezing of a water-bearing surrounding rock at low temperature was considered. The temperature field distribution characteristics of surrounding rock at the tunnel portal section was simulated by introducing ambient air into the tunnel for cooling. Micro-pressure sensors were employed to dynamically monitor the frost-heaving pressure in real time. The spatial and temporal evolution curves of the frost-heaving pressure were obtained for various water content and thickness in surrounding rock. The fitting formulas for parameters such as the frost-heaving rate of surrounding rock, thickness of the frozen circles, and water content were established utilizing multiple regression analysis. Based on this, a theoretical solution for the frost-heaving pressure of the frozen circles in surrounding rock under plain strain state was derived considering the influence of water content and proportion index of surrounding rock. The thermal stress method was used to simulate the evolution characteristics of frost-heaving pressure. Combined with numerical simulations, the test method and theoretical solution were further verified by comparing the predicted frost-heaving pressure with the theoretical and test values. The results indicate that the temperature field of surrounding rock undergoes changes in three stages. This is similar to a regular spoon with a handle-like evolution process;the temperature field of the water-bearing surrounding rock exhibits a non-linear distribution in the descending stage;the temperature field of surrounding rock shows a lagging characteristic relative to the environmental temperature. The sha

关键词： Temperature

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