Chong Wang

Lanzhou University

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Shuangyang Li

Northwest Institute of Eco-Environment and Resources

Yafeng Li

Hunan University

Guo Ting

Shandong University of Science and Technology

Zhenkai Zhang

Jiangsu University of Science and Technology

Hailiang Nie

Hebei University

Jian‐Wen Sun

Lanzhou University

Erdong Liang

Tuo Wang

Nanjing Agricultural University

Lianghong Shi

Northwest Institute of Eco-Environment and Resources

Jianbo Jia

Yanshan University

Cooperative Institutions

Chinese Academy of Sciences

Ludong University

Northwest Institute of Eco-Environment and Resources

China University of Geosciences (Beijing)

Beihang University

University of Chinese Academy of Sciences

Harbin Engineering University

Shanghai Jiao Tong University

Ministry of Natural Resources

Southeast University

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Simulation of the working process of launch vehicle pressurization system in random vibration condition

Beijing Hangkong Hangtian Daxue xuebao (2013)

Chong Wang Liang Guozhu

Cabin pressurization

Random vibration

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ON THE STABILITY OF A POPULATION MODEL WITH NONLOCAL DISPERSAL

Journal of Applied Analysis & Computation (2018)

Jian‐Wen Sun Chong Wang

This paper is concerned with a nonlocal dispersal population model with spatial competition and aggregation. We establish the existence and uniqueness of positive solutions by the method of coupled upper-lower solutions. We obtain the global stability of the stationary solutions.

Competition model

Population model

10.11948/2018.928

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Model Test on Backward Erosion Piping under a K0 Stress State

International Journal of Geomechanics (2022)

Fengshou Zhang Chong Wang Tuo Wang

Piping is a major failure mechanism in both dams and dikes. In this work, we develop a transparent specimen tank that allows a camera to clearly record the piping formation process. In addition, this apparatus is able to maintain a constant hydraulic head and to apply K0 stress states. The eroded soil and the discharged water are measured using a collection system. We conduct a series of laboratory tests to investigate the evolution process and mechanisms of piping in gap-graded soils under a K0 stress state. Our results show that the piping process can be divided into three stages: seepage, pipe formation, and pipe wall erosion. No visible soil erosion and deformation is observed in the seepage stage. In the pipe formation stage, the flow channel is formed gradually from the position where water is injected into the exits. In the pipe wall erosion stage, grains are eroded mainly from the pipe wall. Moreover, erosion is more profound on the convex side than on the concave side of the pipe. From the sensitivity analysis, a large percentage of coarse grains can hinder the formation of the flow channel is observed. Finally, the transition mechanism from suffusion to piping based on different testing conditions is revealed.

Hydraulic head

Dike

Internal Erosion

10.1061/(asce)gm.1943-5622.0002326

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Analysis of the Effect of Whirl on Drillstring Fatigue

Shock and Vibration (2021)

Chong Wang Xufeng Li Yafeng Li Wenhao Xu Wuyi Liao

There are many kinds of vibration forms of drillstring in petroleum drilling. Whirl is one of the main vibration modes when drilling tools are drilling, and it is also the main reason of fatigue failure of the drillstring. In this paper, the causes of drillstring whirl are analyzed. The results show that the speed of rotation (RPM) is a major factor that affects the severity of the whirl. The greater the speed of rotation, the more intense the whirl. The whirl of the drillstring will produce bending stress. The severity of the whirl of the drillstring is the main factor affecting the bending stress. The increase of RPM and weight on bit (WOB) will lead to the increase of bending stress. The RPM has a great influence on the bending stress. Given the complex stress condition of drillstring, the calculation model of safety factor is established. The bending stress and safety factor are calculated under the different WOB and RPM. The relationship between dynamic bending stress and the safety factor of drilling tools is analyzed. Bending stress has great influence on the safety factor of drillstring. The variation trend of safety factor is opposite to that of bending stress caused by whirl. It provides a theoretical reference for the optimization of drilling tools in drilling engineering construction.

Safety factor

10.1155/2021/6666767

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Stator System Vibration Analysis

Jacek F. Gieras Chong Wang Joseph C. S. Lai

10.1201/9781420027730-8

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Robust optimization of coupled structural-acoustic systems based on sensitivity analysis

Beijing Hangkong Hangtian Daxue xuebao (2014)

Chong Wang Qiu Zhiping Xiaojun Wang Di Wu

10.13700/j.bh.1001-5965.2013.0328

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Study on the Ultimate Strength and Stability of Food Stiffened Plate

Advance Journal of Food Science and Technology (2016)

Chong Wang Qin Hongde Guo Ting

Based on the buckling strength of food stiffened plate as the breakthrough point, this study explores the elastic-plastic stability and conducts the stability series analysis of food stiffened plate by virtue of the analysis of longitudinal in-plane load and lateral pressure load of the food stiffened plate frame. The stress state of the food stiffened plate structure is very complex, which is subject to not only the longitudinal pressure caused by the longitudinal bending, but also the lateral pressure of the water. Therefore, it is necessary to consider the full load suffered, in order to calculate the buckling strength of stiffened plate more accurately.

Bending of plates

10.19026/ajfst.11.2670

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Selective trimethylamine sensors based on Co3O4 modified WO3 spheres

Feifei Wang Chong Wang Zhenkai Zhang Erdong Liang Yue Chen

10.2139/ssrn.4876885

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Rapid Detection of Whirl and High-Frequency Torsional Oscillation in Downhole Drilling Tools

Yafeng Li Qilong Xue Jianbo Jia Jinfeng Wang Chong Wang

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Oscillation (cell signaling)

10.2139/ssrn.5084686

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Freezing Technique for Reinforcing the Water bearing Soft Grounds

Construction Technology (2000)

Chong Wang

In the light of the practice of Shanghai subway project, this article describes the completely closed horizontal freezing reinforcing technique in the aspects of design, construction and effect. This technique exists as a new method for the ground reinforcing of water bearing soft soil in China, especially in the underground projects in cities.

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