动态加载条件下土壤承压沉陷特性仿真研究  

Numerical Analysis of Soil Pressure-Sinkage Characteristic Under Dynamic Loading Conditions

作　　者：冯文选 马吉胜 何健 吴大林 FENG Wenxuan;MA Jisheng;HE Jian;WU Dalin(Shijiazhuang Collage,Army Engineering University,Shijiazhuang 050003,China;Xijing University,Xi’an 710123,China)

机构地区：[1]陆军工程大学石家庄校区,石家庄050003 [2]西京学院,西安710123

出　　处：《兵器装备工程学报》2018年第10期105-109,共5页Journal of Ordnance Equipment Engineering

基　　金：军内重点科研项目(404040602)

摘　　要：采用有限元数值分析研究了加载速率对土壤承压沉陷特性的影响,发现能很好拟合经典土壤承压沉陷模型对准静态加载条件下的土壤承压沉陷特性关系,但对动态加载条件下的土壤承压沉陷特性关系的拟合有明显误差。动态加载条件下的土壤承压沉陷特性关系采用Prony法拟合,与经典土壤承压沉陷模型相比具有更高的拟合精度。对土壤承压沉陷实测试验数据对比的结果表明采用Prony法模拟误差较小。In order to improve the fitting accuracy of the pressure-sinkage characteristic between vehicles and ground under dynamic loading conditions,the effect of loading rate on soil pressure-sinkage characteristics was researched by means of finite element analysis.It is found that pressure-sinkage characteristic of soil can be well fitted by classic soil pressure-sinkage fitting models under static loading condition,but the fitting accuracy is dramatically declined under the dynamic loading conditions.Further research shows that the relationship of soil pressure-sinkage characteristic under dynamic loading conditions can be fitted by Prony exponential function.Compared with the classic soil pressure-sinkage model,it has higher fitting accuracy.The experimental date of soil pressure-sinkage were fitted,the result shows that the characteristic of soil pressure-sinkage still accord with Prony exponential function.

关 键 词：土壤 压力沉陷 有限元 PRONY法 

分 类 号：TJ810.1[兵器科学与技术—武器系统与运用工程]