农业机械学报2017，Vol.48Issue(5)：72-78,7.DOI:10.6041/j.issn.1000-1298.2017.05.008
地面力学参数综合测试系统设计与试验
Design and Experiment of Integrated Test System for Terramechanics Parameters
摘要
Abstract
Soil compressive strength and shear strength are important problems in the field of agricultural engineering,and vehicle subsidence depth and driving resistance are closely related with soil pressure and shear properties.In order to improve the testing range of bevameter independent of large equipment and solve the dispersion and diversity of test methods about terramechanics parameters,a comprehensive tester of soil pressure,shear and adhesion both indoor and outdoor was designed.Penetration test was independent of torsion process and did not impact relatively,realizing the testing and data processing independently.Choosing the drive motor or manually driven by screw lift transmission,the test instrument can obtain high range and accurate operating control.The system with cable displacement sensor and force torque sensor can take real-time dynamic travel information about soil sinkage depth,soil shear strength,and soil resistance of bearing pressure and other information,realizing the automation of computer remote control and data acquisition and processing.Shearing tests of wet compacted sand got results that soil cohesion was 3.14 kPa,internal friction angle was 38.2°;the plate loading test of wet compacted got results that the sand deformation index was 0.963,the cohesive dcformation modulus was 178.73 kN/mn+1 and friction deformation modulus was 11 908.40 kN/mn+2.The results showed that the comprehensive test instrument provided experimental basis and played a good effect on the research on load subsidence curve and shear stress distribution.Laboratory sand tests showed that the instrument had high reliability and practicability.The instrument met the requirements of test for a large range,multi dimension and unity of terramechanics parameters.关键词
地面力学/土壤参数/测试系统/承压特性/剪切特性Key words
terramechanics/soil parameters/test system/pressure properties/shear properties分类
农业科技引用本文复制引用
汪伟,赵家丰,沈晨晖,张晓良..地面力学参数综合测试系统设计与试验[J].农业机械学报,2017,48(5):72-78,7.基金项目
国家自然科学基金项目(51575523)和军内科研项目 （51575523）
