Findings in Mechanical Engineering Reported from Tsinghua University (Determination of Pipe Pullback Loads in Horizontal Directional Drilling Using an Advanced Computational Dynamic Model)
By a News Reporter-Staff News Editor at Journal of Engineering -- Fresh data on Mechanical Engineering are presented in a new report. According to news reporting from Beijing, People's Republic of China, by VerticalNews journalists, research stated, "While several procedures or guidelines for predicting pullback loads in pipe installation using the horizontal directional drilling (HDD) technique have been developed, they are based on static assumptions and are approximate analytical or empirical methods. Because of the nature of HDD, determination of the pipe pullback loads is a complex dynamic problem."
The news correspondents obtained a quote from the research from Tsinghua University, "This paper presents a new dynamic model to simulate the pipe pullback process and numerically calculate the pipe pullback loads in HDD installation, where the pipes are modeled by three-dimensional Euler-Bernoulli flexible beam elements based on an absolute nodal coordinate formulation and the interaction between the pipes and the borehole/ground surface is described by a local contact model using the nonlinear Hertz contact theory. To evaluate the method presented, a typical case of HDD installation is examined. The analytical solution of the case in the steady state is derived to validate the method presented."
According to the news reporters, the research concluded: "Numerical results for such useful details as the pulling force, the transient and steady-state axial forces at different locations of the pipes, and the axial stresses in the pipes during and after installation are provided."
For more information on this research see: Determination of Pipe Pullback Loads in Horizontal Directional Drilling Using an Advanced Computational Dynamic Model. Journal of Engineering Mechanics, 2014;140(8):106-117. Journal of Engineering Mechanics can be contacted at: Asce-Amer Soc Civil Engineers, 1801 Alexander Bell Dr, Reston, VA 20191-4400, USA.
Our news journalists report that additional information may be obtained by contacting C.J. Yang, Tsinghua Univ, Dept. of Engn Mech, Beijing 100084, People's Republic of China. Additional authors for this research include W.D. Zhu, W.H. Zhang, X.H. Zhu and G.X. Ren.
Keywords for this news article include: Beijing, People's Republic of China, Asia, Mechanical Engineering
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