Turning traction force of tracked mining vehicle based on rheological property of deep-sea sediment  

深海底质流变特性对履带式集矿机转弯牵引力的影响（英文）

作　　者：Feng XU Qiu-hua RAO Wen-bo MA 许锋;饶秋华;马雯波(中南大学土木工程学院,长沙410075;湘潭大学土木工程与力学学院,湘潭411100)

机构地区：[1]School of Civil Engineering,Central South University,Changsha 410075,China [2]College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411100,China

出　　处：《Transactions of Nonferrous Metals Society of China》2018年第6期1233-1240,共8页中国有色金属学报（英文版）

基　　金：Projects(51274251,11502226)supported by the National Natural Science Foundation of China

摘　　要：Based on main physical and mechanical properties of deep-sea sediment from C-C poly-metallic nodule mining area in the Pacific Ocean, the best sediment simulant was successfully prepared by mixing bentonite with a certain content of water. Compression-shear coupling rheological constitutive model of the sediment simulant was established by endochronic theory and the coupling rheological parameters were obtained by compressive and compression-shear creep tests. A new calculation formula of turning traction force of the tracked mining vehicle was first derived based on the coupling rheological model and consideration of pushing resistance and sinkage of the tracked mining vehicle. Effects of the turning velocity, crawler spacing and contacting length of crawler with deep-sea sediment on the turning traction force were analyzed. Research results can provide theoretical foundation for operation safety and optimal design of the tracked mining vehicle.基于采自太平洋C-C矿区深海原状底质土的主要物理和力学特性,通过将膨润土与特定比例的水进行混合成功配制出最佳深海模拟底质土。基于内时理论建立深海模拟底质土压-剪耦合流变本构方程,并采用压缩蠕变试验和压-剪蠕变试验得到相应的压-剪耦合流变参数。通过首次考虑深海模拟底质土耦合流变模型和履带式集矿机沉陷与推土阻力,推导出一种新的集矿机转弯牵引力计算公式,并详细分析履带式集矿机转弯速度、履带间距和履带接地长度对转弯牵引力的影响规律。研究结果为履带式集矿机的深海作业安全和优化设计提供了理论基础。

关 键 词：turning traction force compression-shear coupling rheology deep-sea sediment tracked mining vehicle 

分 类 号：TD857[矿业工程—金属矿开采]