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Evolution of the Piranshahr pull-apart basin at releasing stepovers of the strike-slip fault systems in Northwest of Iran:Insights from twodimensional numerical modeling

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Journal of Mountain Science 2024年第12期21卷 4282-4298页

作者： SHOKRI Parisa ALAVI Seyed Ahmad GHASSEMI Mohammad Reza GANJIANI Seyed Mehdi Department of Sedimentary and Oil Basins Faculty of Earth SciencesShahid Beheshti UniversityTehran ***Iran Research Institute for Earth Sciences Geological Survey of IranTehran ***Iran Department of Mechanical Engineering University of TehranTehran ***Iran

The Piranshahr pull-apart basin,situated in the northwestern part of the Zagros Main Recent Fault(MRF),is characterized by two right-stepping segments of the dextral ***,a combination of finite element modeling techniques,especially twodimensional numerical modeling using abaqus software,along with field-based structural geological methods are used to assess the geometry and evolution of the pull-apart along the releasing stepovers in this strike-slip *** utilized numerical approach applies two-dimensional(2D)finite-element modeling related to elastic Newtonian rheology to evaluate the distribution of stress and localization of strain within the pull-apart *** study provides valuable insights into the factors controlling the shape,as well as exploring the interaction between the pre-existing structures in this right-lateral strike-slip releasing stepover,pull-apart basin development in strike-slip systems,and stress-strain behavior by studying the impact of boundary conditions and fault overlap on the deformation *** models consider three representative geometries of fault segment interactions,including underlapping,neutral,and overlapping stepovers,positioned at angles of 30°,45°,and 60°.The results indicate that increased overlap creates an extensive and elongated deformation pattern,while decrease overlap leads to block rotation and a narrow deformation *** addition,the degree of overlapping between parallel strike-slip faults influences the stress and *** mean normal stress within the transtensional basin,located between the fault segments,exhibits an extensional nature,while the region outside the stepover experiences general compressive mean normal *** Piranshahr transtensional pull-apart basin exemplifies the progressive evolution of underlapping stepovers,resulting in displaying an elongated rhomboidal to trapezoidal-shaped geometry over time.

关键词： Main Recent Fault Piranshahr pull-apart basin Releasing Stepover Finite element method abaqus software

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Simulation Analysis of Train Disc Brake Temperature Field

Simulation Analysis of Train Disc Brake Temperature Field

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2012年计算机应用与系统建模国际会议

作者： Libo Tang Guoshun Wang Machinery Engineering College Dalian Jiaotong University

Simulation calculation of temperature field of train disc brake system under 500r/min fixed speed condition is carried out by using the software abaqus. The result shows: the heat quantity generated by braking firstly forms tailed area using friction radius as center;with continuous development of braking process, annular temperature distribution is formed, and finally, surface temperature area of brake disc displays spotted. The temperature of brake pad rises quickly. When braking begins 2.5 seconds, the temperature reaches extreme. With extension of braking process, surface temperature begins diffusing to peripheral and thickness directions until it ends. The temperature field distribution obtained by simulation calculation of finite element model provides effective reference for design and engineering application of brake disc and brake pad.

关键词： disc brake temperature field abaqus software finite element analysi

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