Dissertation > Excellent graduate degree dissertation topics show

Dynamics Research on Working Attachments of Mechanical Excavator

Author: ZuoMin
Tutor: LinGuiZuo
School: Northeastern University
Course: Mechanical Engineering
Keywords: excavator dynamics working attachment trajectory kinematics
CLC: TD421
Type: Master's thesis
Year: 2012
Downloads: 1
Quote: 0
Read: Download Dissertation

Abstract


The large mine mechanical excavator is one of the important equipment for domestic and international mining. Whether the working performances of the attachments are well is directly related to the properties of the machines. The practice shows that it shall start from the study on dynamics of working attachments, if improve the machine performance.From the excavator’s theoretical dynamic characteristic curve, on the basis of extreme working conditions, with the natural system of working attachments as the computation model, and the handle and boom as elastomers, nine-degree of freedom dynamic model of the working attachment is established by using multi-body dynamics theory, and the maximum dynamic load and dynamic load coefficient of the components are solved by using lagrange’s equation. Based on the work that we have done, establish elastic mechanics model of two-degree of freedom by ignoring the freedom that make weaker influence on whole structure dynamic. And compare it with the model of multiple degree of freedom dynamic.Make an analysis on the various factors that affect the system dynamic load, and identify possible ways to reduce the dynamic load.Moreover, make study on the kinematics of excavator with the move-point method. Unlike fixed-point method to make the pushing shaft center as the reference point, move-point method makes the meshing point of pushing gear as the reference point. And get the mining track based on the crowd arm and hoist rope speeds. In order to meet the coefficient of full conditions, make an analysis on the crowd arm and hoist rope speeds. The objective of this work is to find the optimal crowd arm and hoist rope speeds.To sum up the work above, it enrich the excavator design theory. At the same time, the methods of modeling and analysis have big significances to other types of mechanical system.

Related Dissertations

  1. Study on Characteristics of Contiuous Fiber-Reinforced Metal Matrix Composites under Hypervelocity Projectile Impact,TB332
  2. Research on Models and Simulation of Electromagnetic Railgun Exterior Trajectory,TJ399
  3. Modeling Analysis and Slip Estimation for Lunar Rovers,TP242
  4. Reaserch on Dynamics for Fast Walking of Biped Robot,TP242.6
  5. Mechanism Design and Kinematic Simulation of a Celiac Invasive Surgical Robot,TP242.3
  6. Key Control Technique of Wafer Handling Robot,TP242.2
  7. Analysis and Control of 6-DOF Electrical Driven Parallel Manipulator,TP242.2
  8. The Drying of Tilapia Fillet Using Supercritical Carbon Dioxide,TS254.4
  9. Influence of Nanostructure on Hydrophobic Properties at TiO2 Surface Studied by Molecular Dynamics Simulation,O614.411
  10. The Study on Grass-roots Civil Servants Working Stress and Job Performance from the Perspective of Service-oriented Government,D630.3
  11. Hydrophilic structure of different types of surface -modified polyurethane material and coagulation 12 factor nine peptide fragments,and fibrinogen P1 fragment of computer simulation of the interaction,O631.3
  12. Influence of Nitrate Concentrations on the Production of N2, N2O, NO, and CO2 by Soil Cores During Anaerobic Incubation,X131.3
  13. Study of the Tunnelling Laneway Drilling and Anchor Rope Installation Device,TD353
  14. The Analyse and Countermeasures Study on the Balance of Energy Supply and Demand in the Period of "12th Five-Year Plan",F426.2
  15. Dynamics Simulation and Finite Element Anslysis of the Loader Working Device,TH243
  16. Dynamics Analysis and Optimization Design of Hydraulic Excavator Working Equipment,TU621
  17. Optimum Design and Simulation Analysis of Hydraulic Excavator Working Devices and Establishment of the Hydraulic System Model,TU621
  18. The Finite Element Analysis and Simulation of Excavator Working Device,TU621
  19. Molecular Dynamics Simulations of Temperature Effects on Pt/Au Heteroepitaxial Growth,O484.1
  20. Molecular Dynamics Simulations of Structural Relaxation of Two-dimensional Lattice Mismatch Epitaxial Aluminum Thin Film,O484.1
  21. A Moledular Dynamics Simulation Study of Effects of Temperature on Epitaxial Growth in Cu-Ni Thin Flim,O611.3

CLC: > Industrial Technology > Mining Engineering > Mining machinery > Mining machinery > Underground mining machinery
© 2012 www.DissertationTopic.Net  Mobile