Computer simulation and model test research on strength test of hydraulic support

2006 ◽  
Author(s):  
Hongyu Liu ◽  
Xun Fan
Keyword(s):  
Computer Simulation ◽  
Model Test ◽  
Strength Test ◽  
Hydraulic Support

Hydraulic Support Model Test Load Equipment and its Hydraulic Control System

2011 ◽  
Vol 189-193 ◽  
pp. 4455-4458 ◽  
Author(s):  
Hong Yu Liu
Keyword(s):  
Control System ◽  
Model Test ◽  
Similarity Theory ◽  
Strength Test ◽  
Hydraulic Control ◽  
Hydraulic Support ◽  
Support Design ◽  
Test Load ◽  
Hydraulic Control System ◽  
Support Model

Hydraulic support is an important equipment of mechanization caving coal in modernization coal mine. Hydraulic support strength test is a key link in hydraulic support design. Based on the similarity theory, the displacement, stress and strain information of test measured from hydraulic support model test can be popularized to hydraulic support prototype. This has an important significance on successful pass in prototype hydraulic support strength test and quicker and better designing eligible hydraulic support. The construction of load equipment and hydraulic control system of hydraulic support model test provides a practical and convenient research way of hydraulic support model test.

Design Application of LQS20000 Column Strength Test Bench

2013 ◽  
Vol 744 ◽  
pp. 128-131
Author(s):  
Peng Fei Lui ◽  
Xiao Wei Shao ◽  
Xiang Hui Meng
Keyword(s):  
Test Bench ◽  
Strength Test ◽  
Loading Test ◽  
Hydraulic Support ◽  
Cylinder Strength ◽  
Stable Performance ◽  
Dual Extension ◽  
Working Resistance ◽  
Test Requirements ◽  
New Criterion

Analyzed the trend of the development of hydraulic powered support and column, this paper designs a column strength test bench with 20000KN working resistance which combined with the new release of GB25974.2-2010 for coal mine hydraulic support and jack technical conditions of Part 2 standard requirements. Through the practical application, it turned out that the test bench has reasonable structure, stable performance and it can meet all of the following Ф630 bore hydraulic support column factory test requirements. The trend of the mine-used hydraulic support column and the performed new criterion demands manufacturers to enhance the ability of test equipment. In this situation, the 20000KN column strength test bench our company designed and manufactured not only do the loading test, but also apply external load at columns by simulating the actual working conditions, which is essential to Inspection and testing of dual-extension hydraulic columns middle cylinder strength.

scholarly journals Welding Deformation of Hydraulic Support Measurements by Using FBG Sensors

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Shangyu Du ◽  
Guofa Wang ◽  
Yajun Xu ◽  
Ying Ma ◽  
Desheng Zhang ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Stable State ◽  
Strength Test ◽  
Deformation Monitoring ◽  
Bragg Grating ◽  
Welding Deformation ◽  
Hydraulic Support ◽  
Eccentric Load ◽  
Welding Seam ◽  
Whole Life Cycle

The welding deformation and cracking of hydraulic support have always been an important issue that impacts product quality and performance in the industry. In order to quantify the deformation of the welding seam of the reverse four-bar linkage hydraulic support under loading conditions, a real-time weld monitoring system based on sensitive fiber Bragg grating sensors is designed. The strength test and the cycle life test of the top coal caving reverse four-link support with four typical eccentric loads were conducted, respectively. The strength test results prove that the fiber Bragg grating sensor is accurate enough to measure welding deformation of hydraulic support; the measurement resolution reaches 0.1 μm. The eccentric load experiment produces the reverse four-bar torsion, especially when the top beam is at a low position; the maximum deformation of the weld is 100 μm. In the cycle test, a phenomenon has been captured, i.e., the welds present a baseline shift along with the cyclic load and even jump. It indicates that the hydraulic support changes from one stable state to another stable state. This work not only provides a feasible solution for welding deformation monitoring but also provides a possibility for the whole life cycle monitoring of hydraulic supports.

Finite Element Analysis of the φ320mm Hydraulic Support Column

2012 ◽  
Vol 490-495 ◽  
pp. 3331-3333
Author(s):  
Jian Ying Liu ◽  
Yue Fang
Keyword(s):  
Finite Element Analysis ◽  
Computer Simulation ◽  
Finite Element ◽  
Stress Distribution ◽  
3D Modeling ◽  
Theoretical Basis ◽  
Strength Analysis ◽  
Force Analysis ◽  
Hydraulic Support ◽  
Element Analysis

This paper mainly solved the 3D modeling and force analysis of φ320 mm hydraulic support column. According to the hydraulic support column standard, computer simulation was manipulated forφ320mm column by not only 1.5 times rated axis load strength analysis but also 1.1 times rated load and eccentric 30mm buckling analysis. Through analysis and simulation tests，not only the distribution and deformation ofφ320mm column but also the stress distribution and simulation conditions were got about column. Thus, theoretical basis could be provided for the design of column.

Research on Guarantee Equipment for Setting Load of Hydraulic Supports

2010 ◽  
Vol 44-47 ◽  
pp. 2021-2025 ◽  
Author(s):  
Xin Zhang ◽  
Jian Wu Zhang ◽  
Li Rong Wan ◽  
Meng Zang
Keyword(s):  
Computer Simulation ◽  
Simulation Method ◽  
Pressure Curve ◽  
Displacement Curve ◽  
Hydraulic Support ◽  
Computer Simulation Method ◽  
Pumping Station ◽  
Lower Chamber ◽  
Short Time ◽  
Hydraulic Supports

To solve the shortage of setting load of hydraulic support, this paper puts forward a computer simulation method. The reason for the shortage of setting load is firstly analyzed by simulating the pressure curve of prop’s lower chamber and the displacement curve of movable prop. It can be found that even prop lower chamber is supplied with fluid continuously, the pressure won’t reach to the pressure of pumping station, and the setting load also can’t be achieved. Secondly, the principle of auto-pressurized guarantee equipment for setting load is present. Only acting on one displacement, the pressurized valve can reach the pressure of pumping station. Simulation result also indicates that it can meet the requirement of setting load in a short time after the top beam reaches to the roof.

Finite Element Analysis of ZY18000/32/70D Hydraulic Support Double Telescopic Mast

2012 ◽  
Vol 184-185 ◽  
pp. 231-234
Author(s):  
Jian Ying Liu ◽  
Ling Bai
Keyword(s):  
Finite Element Analysis ◽  
Computer Simulation ◽  
Finite Element ◽  
Stress Distribution ◽  
3D Modeling ◽  
Theoretical Basis ◽  
Strength Analysis ◽  
Force Analysis ◽  
Hydraulic Support ◽  
Element Analysis

This paper mainly solved the 3D modeling and force analysis of double telescopic mast about the real structure of ZY18000/32/70D hydraulic support. According to the GB of mast standard, computer simulation was manipulated for double telescopic mast about ZY18000/32/70D hydraulic support by not only 1.5 times rated axis load strength analysis but also 1.1 times rated load and eccentric 30mm buckling analysis. Through analysis and simulation tests，not only the distribution and deformation of the double telescopic mast about ZY18000/32/70D hydraulic support but also the stress distribution and simulation conditions were got about mast. Thus, theoretical basis could be provided for the design of double telescopic mast about ZY18000/32/70D hydraulic support.

Characterization of Modulated Structure Through Structure Images and their Computer Simulation

1990 ◽  
Vol 48 (1) ◽  
pp. 70-71
Author(s):  
Kiyomichi Nakai ◽  
Yusuke Isobe ◽  
Chiken Kinoshita ◽  
Kazutoshi Shinohara
Keyword(s):  
Computer Simulation ◽  
High Resolution ◽  
Spherical Aberration ◽  
High Resolution Electron Microscopy ◽  
Basic Mechanism ◽  
Objective Lens ◽  
Specimen Thickness ◽  
Transmitted Beam ◽  
Modulated Structure ◽  
Resolution Electron

Induced spinodal decomposition under electron irradiation in a Ni-Au alloy has been investigated with respect to its basic mechanism and confirmed to be caused by the relaxation of coherent strain associated with modulated structure. Modulation of white-dots on structure images of modulated structure due to high-resolution electron microscopy is reduced with irradiation. In this paper the atom arrangement of the modulated structure is confirmed with computer simulation on the structure images, and the relaxation of the coherent strain is concluded to be due to the reduction of phase-modulation.Structure images of three-dimensional modulated structure along <100> were taken with the JEM-4000EX high-resolution electron microscope at the HVEM Laboratory, Kyushu University. The transmitted beam and four 200 reflections with their satellites from the modulated structure in an fee Ni-30.0at%Au alloy under illumination of 400keV electrons were used for the structure images under a condition of the spherical aberration constant of the objective lens, Cs = 1mm, the divergence of the beam, α = 3 × 10-4 rad, underfocus, Δf ≃ -50nm and specimen thickness, t ≃ 15nm. The CIHRTEM code was used for the simulation of the structure image.

Sign in / Sign up

Export Citation Format

Share Document