土体力学性质研究的三轴虚拟仿真试验开发

Development of triaxial virtual simulation experiment for the study of soil mechanical properties

三轴剪切试验是研究土体力学性质的重要试验,在土力学试验中处于核心地位。但是,三轴剪切试验制样困难、操作过程复杂、试验周期长,初学者在短时间内很难掌握基本的试验技能,为此,开发并利用三轴虚拟仿真试验开展教学工作显得尤为重要。开发的三轴虚拟仿真试验包含了虚拟试验操作和电子报告两个部分,学生可以在移动端熟悉三轴剪切试验仪器结构以及试验操作过程,延伸试验教学时间和空间,在低成本、低消耗、无安全隐患的前提下,提升试验教学质量和水平,激发学生的学习积极性。为通过三轴虚拟仿真试验得到较真实的土体力学性质和参数,将砂土力学和本构参数的大数据预测功能融入三轴虚拟仿真试验中,学生不仅熟悉了试验操作过程,还可以深入理解土体的力学特性与物理性质的关联性,促进创新创造性能力的综合培养。将三轴虚拟仿真试验用于本科生土力学、研究生岩土工程试验这两门课程,取得了较好的教学效果。

Triaxial test is an important test to study the mechanical properties of soil,and it plays a key role in soil mechanics test.However,it is difficult for beginners to master the basic testing skills in a short time due to the difficulty of sample preparation,complex operation process and long test cycle of triaxial test.Therefore,it is particularly important to develop and use triaxial virtual simulation test to carry out teaching work.The developed triaxial virtual simulation experiment includes two parts:virtual experiment operation and electronic report.Students can be familiar with the structure and operation process of triaxial experiment instrument on the mobile terminal,extend the time and space of experiment teaching,improve the quality and level of experiment teaching and stimulate students’learning enthusiasm under the premise of low cost,low consumption and no potential safety hazard.In order to obtain more real soil mechanical properties and parameters through virtual triaxial test simulation,the big data prediction function of mechanics and constitutive parameters of sand is integrated into the triaxial virtual simulation test.Students are familiar with the test operation process,and can deeply understand the correlation between mechanical properties and physical properties of soil,so the two courses of soil mechanics for undergraduates and geotechnical engineering test for postgraduates,and good teaching effect is achieved.