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中文摘要：
采用离散元法对月面及地面跨度范围内重力场环境(1/6g,1/2,1g)下静力触探机理进行了分析,以弄清地面试验与月面试验的区别。模拟结果表明:1同一相对贯入深度处,重力加速度越小,贯入阻力越小,归一化贯入阻力越大;2土体变形形式由隆起变形向竖向压缩变形的转化深度随重力加速度的增加而减小;3同一相对贯入深度处,随重力加速度的增加,特征点的竖向隆起位移减小,竖向压缩位移增大,对应土体颗粒的侧向位移也越大;4重力加速度越小,相同相对位置处土体的加卸载现象越明显;5重力加速度越大对应相同相对贯入深度处的土体破坏范围愈大。
英文摘要：
The mechanism of cone penetration tests under low gravity (1/6g, 1/2g and 1g) fields is investigated by means of the distinct element method (DEM). The results show that (1) the cone tip resistance increases with the increase of gravity acceleration at the same relative penetration depth, while the normalized cone tip resistance presents the opposite trend;(2) the required depth, which the deformation pattern of the ground changes from swelling to compression, decreases with the increase of gravity acceleration;(3) the swelling deformation of characteristic points decreases with the increase of gravity acceleration at the same relative penetration depth, but the compression deformation and lateral displacement show the opposite trend;(4) the smaller gravity acceleration leads to the more apparent loading and unloading phenomena at the same relative position;(5) the larger gravity acceleration results in the larger failure zone at the same relative penetration depth.
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