Dissertation > Excellent graduate degree dissertation topics show

Strength Analysis of Large-scale Hydraulic Support Roof Timber

Author: WangXueMing
Tutor: LiangXingPei
School: Henan University of Technology
Course: Structural Engineering
Keywords: a roof timber of hydraulic support weld finite element stress analysis
CLC: TD355.4
Type: Master's thesis
Year: 2010
Downloads: 118
Quote: 0
Read: Download Dissertation

Abstract


Hydraulic support is the main mining automation equipment in China, and the roof timber is the main structural parts of hydraulic support. Because formulas of mechanics of materials is commonly used in the design of the strength of hydraulic support, the stress distribution can not be got in detail, and the influence of the weld on the stress can not be investigated. ZY8640/24/50 hydraulic support roof timber is simulated by finite element method in the article. The difference from the common numerical simulation of hydraulic support is that the model of the roof timber is include the weld, so this calculating model can more realistically reflect the real working conditions and stress distribution. According to finite element results, the stress of the roof timber is evaluated, and a comprehensive stress concentration factor of weld and a estimating formula of weld average stress are proposed.First, the calculating methods of the roof timber weld are discussed. The T-shaped welded joint model is simulated in the multi-condition by using finite element method. Basing on calculated results, a comprehensive stress concentration factor of weld and a estimating formula of weld average stress are proposed.The strength of two kinds of roof timber A and B with weld are analyzed in three working condition by finite element method, and the weld stress are investigated. According to the calculated results, the strength of the roof timber are checked and the evaluation proposals are put forward. It can be seen that the stress in most region of the roof timber of the main structure is lower than 460MPa, so the strength in most regions of the main structure and the weld of the roof timber have certain amount of surplus. Adopted measures of local strengthen, the strength level of the base material can be lowered, thereby, production cost is reduced.Basing on the calculated results of the roof timber A, the average stress of the weld of the roof timber B is estimated by the estimating formula of weld average stress. Through comparing and analyzing the results of finite element results and estimated results of the roof timber B weld average stress, the comprehensive stress concentration factor of weld and the estimating formula of weld average stress are verified numerically. The results show that the estimated results are in good agreement with the finite element results and the maximum discrepancy is 6.35% which can meet the design requirements. A new way of thinking of hydraulic support design is proposed, which can shorten product development cycles and save product research fundings.

Related Dissertations

  1. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  2. EDM Electrode Wear Mechanism and Control Research,TG661
  3. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  4. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  5. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  6. Simplified Analysis of Semi-Rigid Steel Frames under Vertical Loading,TU391
  7. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  8. Stability Analysis of Roller Compacted Concrete Gravity Dam Based on Time-history Method,TV642.2
  9. Study on the Design and Biomechanical Behaviors of Individualized Artificial Knee Joint,R318.1
  10. Design of Testing Equipment for Electronic Products,TN06
  11. S-lay Installation Analysis for Deepwater Pipeline,TE973
  12. Research on Intelligent Aerial Bomb for Forest Fire Fighting,S762
  13. Multi-pin Internal Fixation of Calcaneal Fractures in Finite Element Analysis,R687.3
  14. The Analysis and Comparison of Adjacent Segment Degeneration of the Finite Element Caused by Three Posterior Lumbar Fusion Style,R687.3
  15. Injection Process Analysis and Optimized Deign of MP4 Product Based on the Moldflow Software,TQ320.662
  16. The Establishment and Preliminary Application of the Three-dimensional Finite Element Model of Ankle Joint,R687.3
  17. Different Bottom Structure of Dental Brackets Affect the Adhesiveness-Three Dimensional Finite-element Analysis,R783.5
  18. Airborne radar antenna pedestal rapid design systems research and development,TN959.73
  19. Sham hose drum drive means and hydraulic system of the structure,TE973
  20. The magnetorheological damper mechanical properties and Gun Recoil,TB535.1
  21. Residual Stress Research of the Laminates of Integral Multilayer-Wrapped Pressure Vessel,TH49

CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Mine support equipment > Mining face support > Hydraulic support and its control
© 2012 www.DissertationTopic.Net  Mobile