摘要
根据三轴试验结果获得了模拟月壤的模型参数,在ABAQUS中基于修正的Drucker Prager Cap弹塑性模型建立了模拟月壤的仿真模型,并通过仿真的压板沉陷试验对试验测到的模型参数进行校正,然后基于该模型对月球车刚性车轮和模拟月壤的相互作用进行了仿真分析和试验验证,结果发现牵引力的计算结果在低滑转率下和试验结果复合较好,而在高滑转率下,计算结果偏大。最后对不同土壤自重下单个月球车车轮的牵引性能变化进行了仿真分析,发现单是土壤自重的变化对车轮牵引性能影响不明显。
The numerical model of one lunar soil stimulant was implemented into the commercial finite element code ABAQUS based on the modified Drucker-Prager Cap plasticity model using the constitutive parameters acquired through conventional tri-axial tests, and the model parameters were calibrated by re-analysis of plate sinkage tests. Then the interaction between the lunar rover wheel and lunar soil stimulant was analyzed using the proposed model and validated by soil bin tests. It turned out that the calculation results of drawbar pull agreed well with the experimental results at low slippage. At the end of this article, the traction performance of one single lunar rover wheel at different soil self weights was studied and it was proved that only varying the self weight of the soil had little influence on the traction performance of the wheel.
出处
《强度与环境》
2010年第1期47-52,共6页
Structure & Environment Engineering
