引用本文: 崔洋洋, 张军徽, 佟安, 武娜. 砂土类材料离散元细观参数的自动识别1)[J]. 力学与实践, 2019, 41(3): 300-307.
CUI Yangyang, ZHANG Junhui, TONG An, WU Na. AUTOMATIC IDENTIFICATION OF MESOSCOPIC PARAMETERS OF DISCRETE ELEMENTS OF SAND MATERIAL 1)[J]. MECHANICS IN ENGINEERING, 2019, 41(3): 300-307.
 Citation: CUI Yangyang, ZHANG Junhui, TONG An, WU Na. AUTOMATIC IDENTIFICATION OF MESOSCOPIC PARAMETERS OF DISCRETE ELEMENTS OF SAND MATERIAL 1)[J]. MECHANICS IN ENGINEERING, 2019, 41(3): 300-307.

## AUTOMATIC IDENTIFICATION OF MESOSCOPIC PARAMETERS OF DISCRETE ELEMENTS OF SAND MATERIAL 1)

• 摘要: 本文依照四川大学某理论力学教学班实际教学改革的经验,通过具体举例说明计算机技术在理论力学教学中尚未开发的巨大潜力,减小数学运算使学生重点关注理论力学基本原理,批量求解使学生提前接触实际应用案例,普适性求解使学生深化对处理多变量问题的认识。同时本文还探讨了理论力学教学改革的方向和目的,即把教学重点放在普适的教学方法上,借助计算机求解多刚体、多变量问题,以期有助于理论力学教材更好地适应时代发展。

Abstract: Accurate identification of mesoscopic parameters are the precondition to conduct the discrete element simulation reasonably. Based on the optimization theory, an automatic method for identifying mesoscopic parameters of sand material is proposed in this paper. The PFC software is used to simulate the biaxial compression test of a kind of standard sandy soil. By minimizing the error between the stress-strain curves obtained by conducting the PFC biaxial compression test and the laboratory test, mesoscopic parameters are identified automatically by using the mode search method. Numerical results show that the stress-strain curves obtained by the numerical simulation and the laboratory test agree very well with those based on the mesoscopic parameters obtained by using the proposed method in this paper, with high efficiency and accuracy.

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