Effects of soil conditions on dynamic mechanical parameters for digging machines.;
土壤条件对挖坑机动态力学参数的影响
Effects of working parameters on dynamic mechanical parameters for digging machine(I). Test and study of dynamic mechanical parameters for digging machine.;
作业参数对挖坑机动态力学参数影响的试验研究(Ⅰ)——挖坑机动态力学参数的测试与研究
Mathematical modeling and simulation for torsional vibration of auger-bit of a digging machine for tree planting;
植树挖坑机钻头扭转振动数学建模与仿真
Finite Element Analysis of the Principal Axis of Earth Auger and Dynamic Simulation of Hanging Machine;
挖坑机主轴的有限元分析及其悬挂机构的动力学仿真
This paper optimized the principal axis of the earth auger by ANSYS,introduced the mathematic model and the steps of the optimization design.
用有限元分析软件ANSYS对挖坑机主轴进行优化设计,从理论上说明优化设计的数学模型,并给出具体的设计步骤。
This paper established the cutting model of blade which is the important part of earth auger,and analysed the relationship between the parameters of geometrical structure and the force of cutting with MATLAB.
挖坑机在我国植树造林、保护生态环境中具有重要的地位。
b s theory of the bit critical speed Of hole diggers during soil lifting,this paper makes a study of the motion and received-forces conditions of a soilunit body on the spiral surface of the bit.
勃利里关于挖坑机钻头升土临界速度进行分析后，研究了钻头螺旋面上任选土壤单元体的运动与受力情况。
, the result shows: the mode of digging pit with machine is the best which survival rate is higher than other mode by 5 ~ 30 percent and can save money 697.
通过对杨树插条造林的四种不同整地方式试验 ,结果表明 :机械挖坑最好 ,成活率比其他整地方式高5 %～ 3 0 % ,比人工挖坑每公顷节约资金 697。
It will beimportant and realistic to study dynamic performance of auger-bit when it works for tree deepplanting, to establish and perfect the dynamic theory systematically under the interactionbetween auger-bit and soil, to clear the.
本文将钻头几何学、运动学、动力学、土壤力学、弹性力学、振动理论、微分方程、数值计算方法、泛函分析、仿真理论及计算机应用技术等科学融合为一体，通过理论分析并结合实验测试，对深植挖坑机钻头与土壤作用系统动力学响应特性进行了系统的研究。
Strength Analysis of Screw Sufface and Structure Parameters Study of Auger of Mounted Hole Digger
挖坑机钻头螺旋面强度分析及结构参数探讨
Research on Simulation and Mathematical Interpretation of Dynamic Process to Earth Auger for Tree Deep Planting;
深植挖坑机钻头动态过程数学描述与仿真研究
Finite Element Analysis of the Principal Axis of Earth Auger and Dynamic Simulation of Hanging Machine;
挖坑机主轴的有限元分析及其悬挂机构的动力学仿真
Earth augers have their important status in tree planting and forestation and environmental protection.
挖坑机在我国植树造林、保护生态环境中具有重要的地位。
Eleven, twelve, dig a dale.
十一，十二，挖个坑。
First, I'll make a hole.
首先，我要挖个坑。
A Study of Mechanism of Earth Berms and the Simplified Analysis Method for Excavation;
基坑开挖反压土作用机理及其简化分析方法研究
Optimization and Practice of Bracing System for Open Cut Tunnel Excavation near Meilan Airfield
美兰机场明挖隧道基坑围护支撑体系优化及实施
They dug a pit to bury the rubbish.
他们挖了一个坑埋垃圾。
Dig a pit and bury the garbage.
挖一个坑把垃圾埋了。
dig a pit, tunnel, shaft, etc
挖坑、 隧道、 升降井等.
On Excavation Construction Technique of Soft Soil Foundation Pit with Super Deep Foundation "Pit-in-pit"
带有超深坑中坑的软土基坑挖土施工技术
undermine a wall
挖墙角,在城墙下面挖掘坑道
Numerical Analysis of Excavation Characters in Top-down Construction and Bottom Upheaval for Deep Excavation;
深基坑坑底回弹及逆作法开挖性状数值分析
Numerical Simulation Analysis for Impact of Foundation Pit Excavation on Bottom Piles;
基坑开挖对坑底工程桩影响的数值模拟分析
Numerical Analysis of Influence of Pit Excavation on Pile Foundation
基坑开挖对坑内工程桩影响的数值分析
Application of double pile foundation pit support in the excavation of foundation pit adjoining existing railway
双排桩基坑支护在临近既有线基坑开挖的应用
Analysis of stability of excavation based on method of reduced shear strength
基于强度折减法的深基坑开挖坑底稳定性分析
