Comparative assessment of rubber steel cables for vertical mine hoists

2020 ◽  
pp. 85-93
Author(s):  
V. E. Perekutnev ◽  
V. V. Zotov
Keyword(s):  
Feasibility Study ◽  
Carrying Capacity ◽  
Load Distribution ◽  
Comparative Assessment ◽  
Life Extension ◽  
Steel Cable ◽  
Motion Stability ◽  
Cable Length ◽  
Steel Cables ◽  
Mine Hoist

Operation of inhaul rubber steel cables in vertical mine hoisting is discussed. The research in the field of mine hoisting is reviewed, and the further R&D directions are identified. Some studies concern life extension of hoisting ropes. One of the promising trends seems to be application of belt pullers as inhaul cables, which can essentially enhance mine hoist efficiency. In the meanwhile, capabilities of rubber steel cables suffer from deficient attention. The performance capabilities of rubber steel cables of top manufacturers (Promkanat and SAG) are compared, and application ranges in vertical mine hoisting are determined for such cables. It is found that the Polish manufacturer’s rubber steel cables offer a wider range of application. The analysis shows that rubber steel cables can be used as inhaul cables of vertical mine hoisters. Rubber steel cables possess suitable characteristics and are capable to elevate considerable loads to various hoisting heights. In particular, the existing rubber steel cables ensure carrying capacity of hoists up to 20-25 t at the hoisting heights to 400-500 m and sometimes can elevate skips with tonnage of 10 t to a height up to 1000 m and more. The further feasibility study of operation of inhaul steel rubber cables in hoisting units should address motion stability of a puller on a driving drum, load distribution in ropes of base of rubber steel cables, validation of hoister design, adjustability of rubber steel cable length during its operation, etc.

Research on Catenary Characteristics of FAST Tie-Down Cable and its Effect on Actuator and Joint

2014 ◽  
Vol 875-877 ◽  
pp. 664-670
Author(s):  
Jian Xing Xue ◽  
Xue Dong Gu ◽  
Li Qiang Song ◽  
Qi Ming Wang ◽  
Xue Bin Zhai ◽  
...  
Keyword(s):  
Tangential Force ◽  
Steel Cable ◽  
Initial Tension ◽  
Cable Length ◽  
Experimental Scheme ◽  
Reflector Surface ◽  
Equilibrium Differential Equation ◽  
And Control ◽  
Measurement And Control ◽  
Mechanics Characteristics

To study catenary characteristics of FAST (Five-hundred-meter Aperture Spherical radio Telescope) tie-down cable, this paper establishes tie-down cable equilibrium differential equation and cable length formula based on catenary theory, analyzes numerical simulation of multi-segment bar element method, and designs an experimental scheme. Taking 1×7 Ø12.7steel cable and Ø10 CFRP (Carbon Fiber Reinforced Polymer) cable for example, we can obtain three results respectively through manners mentioned above, and the agreement among them is excellent. Meanwhile, difference between results and elastic deformation of no-weight cable is not so big that catenary of two cables can be negligible. Further research shows that cable length is more sensitive to catenary than horizontal angle; cable longer deformation will benefit actuator to meet position precision effortlessly, however, stroke and velocity of actuator will increase and initial tension displacement of tie-down cable decrease correspondingly, this alteration should be compensated during reflector surface measuring and controlling; due to chord-tangent angle and tangential force is less than 1.28°and 241.4N, catenary effect on joint pose is weaker; generally speaking, CFRP cable has less catenary problem than steel cable, better mechanics characteristics, but bigger stroke and velocity for actuator and smaller initial tension displacement for tie-down cable. The research will provide references for design of tie-down cable, actuator, joint, and reflector measurement and control.

scholarly journals Application of the Non-Contact Video Gauge on the Mechanical Properties Test for Steel Cable at Elevated Temperature

2019 ◽  
Vol 9 (8) ◽  
pp. 1670 ◽  
Author(s):  
Yong Du ◽  
Zhang-ming Gou
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Ambient Temperature ◽  
Strain Gauge ◽  
Complex Shape ◽  
Full Range ◽  
Steel Cable ◽  
Stress Strain ◽  
Strain Stress ◽  
Steel Cables

As the limit of traditional contact measurement, it is difficult to precisely measure the steel cables twisted by a branch of wires especially at elevated temperature. In this paper the strain-stress relationships of S355 and S690 structural steel, 1860 MPa steel cable twisted by seven wires have been measured by the strain gauge, extensometer and non-contact video gauge at ambient temperature and elevated temperature, respectively. Comparison of the stress-strain curves gotten by different measuring technology, it indicates that the non-contact video gauge can provide a more efficient and reliable database than the strain gauge as well as extensometer, especially at an elevated temperature. It is worth noting that the non-contact video gauge can capture not only the full range of stress-strain curves of steel cables, but is also efficient for the specimens with a complex shape.

Nonlinear vibrations of CFRP cables excited by periodic motions of supports in cable-stayed bridges

2018 ◽  
Vol 24 (22) ◽  
pp. 5249-5260 ◽  
Author(s):  
Kuihua Mei ◽  
Guoqing Jin ◽  
Shengjiang Sun
Keyword(s):  
Numerical Solutions ◽  
Geometrical Nonlinearity ◽  
Stay Cable ◽  
Periodic Motions ◽  
Nonlinear Dynamic Model ◽  
Steel Cable ◽  
Traffic Loading ◽  
Stay Cables ◽  
Vibration Responses ◽  
Steel Cables

Owing to its excellent non-corrosiveness and fatigue resistance, a carbon fiber-reinforced polymer (CFRP) stay cable is an ideal alternative to overcome corrosion and fatigue problems associated with the traditional steel cable. However, stay cables are prone to various oscillations under wind, rain, and traffic loading. The vibrations of CFRP stay cables excited by periodic motions of the girder and/or pylons were studied and compared with those of steel cables. A nonlinear dynamic model for in-plane and out-of-plane vibrations of stay cables was proposed. Particularly, the geometrical nonlinearity of the cables was considered in this model. On the basis of this model, numerical solutions were obtained for CFRP cables and steel cables with the same conditions. Furthermore, the effects of important parameters on vibrations were discussed. These parameters included cable tensions, excitation amplitudes, and damping ratios. Results demonstrate that small excitation amplitudes may lead to forced vibrations or parametric vibrations with substantial amplitudes when natural frequencies of the cables are approximately half or one time of excitation frequencies. The maximal vibration responses of CFRP cables are weaker than those of steel cables when their lengths are substantial. As static tensions of the cables decrease, the “beating” frequencies and the maximal amplitudes of the vibrations increase.

scholarly journals Static and Dynamic Mechanical Properties of Long-Span Cable-Stayed Bridges Using CFRP Cables

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Mei Kuihua ◽  
Sun Shengjiang ◽  
Jin Guoqing ◽  
Sun Yamin
Keyword(s):  
Vibration Frequency ◽  
Temperature Effects ◽  
Natural Vibration ◽  
Dynamic Performance ◽  
Design Parameters ◽  
Natural Vibration Frequency ◽  
Steel Cable ◽  
Cable Stayed Bridge ◽  
Steel Cables ◽  
Cable Stayed Bridges

The elastic modulus and deadweight of carbon fiber-reinforced polymer (CFRP) cables are different from those of steel cables. Thus, the static and dynamic behaviors of cable-stayed bridges using CFRP cables are different from those of cable-stayed bridges using steel cables. The static and dynamic performances of the two kinds of bridges with a span of 1000 m were studied using the numerical method. The effects of geometric nonlinear factors on static performance of the two kinds of cable-stayed bridges were analyzed. The live load effects and temperature effects of the two cable-stayed bridges were also analyzed. The influences of design parameters, including different structural systems, the numbers of auxiliary piers, and the space arrangement types of cable, on the dynamic performance of the cable-stayed bridge using CFRP cables were also studied. Results demonstrate that sag effect of the CFRP cable is much smaller than that of steel cable. The temperature effects of CFRP cable-stayed bridge are less than those of steel cable-stayed bridge. The vertical bending natural vibration frequency of the CFRP cable-stayed bridge is generally lower than that of steel cable-stayed bridge, whereas the torsional natural vibration frequency of the former is higher than that of the latter.

scholarly journals Feasibility study and carrying capacity of Lake Batur ecosystem to preserve tilapia fish farming in Bali, Indonesia

2018 ◽  
Vol 19 (2) ◽  
pp. 563-570
Author(s):  
I WAYAN BUDIASA ◽  
I GUSTI NGURAH SANTOSA ◽  
I GUSTI AGUNG AYU AMBARAWATI ◽  
I KETUT SUADA ◽  
I NYOMAN SUNARTA ◽  
...  
Keyword(s):  
Water Quality ◽  
Feasibility Study ◽  
Carrying Capacity ◽  
Net Present Value ◽  
Fish Farming ◽  
Economic Life ◽  
Cost Ratio ◽  
Water Quality Criteria ◽  
Lake Area ◽  
Net Benefit

Budiasa IW, Santosa IGN, Ambarawati IGAA, Suada IK, Sunarta IN, Shchegolkova N. 2018. Feasibility study and carrying capacity of Lake Batur ecosystem to preserve tilapia fish farming in Bali, Indonesia. Biodiversitas 19: 563-570. Lake Batur in Bangli District was potential for fishery development up to 5% of the total water area. Currently the lake area used for fishery was only 6.28 ha, leaving the area up to 77.07 ha potential for fishery development. Tilapia (Oreochromis niloticus) was the most abundant fish in the lake. This research aimed to evaluate the financial feasibility of tilapia fish farming with Floating Net Cages (FNC) technology within the lake and to assess its carrying capacity for the tilapia aquaculture. Discounted investment criteria were used to test farm survey data from 30 tilapia fish growers at top three villages which had the largest number of FNC. Six water samples were taken using deep water sampler at three sampling points were analyzed to see a number water chemistry and physics condition. The results showed that economic life of a FNC was financially feasible as indicated by the positive Net Present Value (NPV), Internal Rate of Return (IRR) was greater than 9% and Net Benefit Cost Ratio (Net B/C) was greater than one; and however the water quality as indicated by value of TDS, NO2, BOD, Total-P, NH3, and P-PO4 exceeded the maximum limit of water quality criteria class II based on Government of Indonesia Regulation No. 82/2001. Thus, FNC should not be more expanded within the lake due to water pollution of the lake.

Cross-Sectional Damage Localization and Quantification for Steel Cables Using MFL 3D Imaging Technique

2013 ◽  
Vol 281 ◽  
pp. 55-58
Author(s):  
Dong Hwan Lee ◽  
Ju Won Kim ◽  
Chang Gil Lee ◽  
Seung Hee Park ◽  
Jong Jae Lee
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnets ◽  
Digital Signal ◽  
Magnetic Flux Density ◽  
Inspection System ◽  
Steel Cable ◽  
Cross Sectional ◽  
Sensor Head ◽  
Damage Level ◽  
Steel Cables

In this study, a MFL (Magnetic Flux Leakage) based 3D inspection system which is incorporated into a cable climbing robot was investigated to monitor the healthy condition of steel cables. Firstly, a MFL sensor head prototype composed of two permanent magnets and eight hall sensors was designed and fabricated. A steel cable specimen with several types of damage, such as corrosion and cutting, was inflicted and scanned by the MFL sensor head to measure the magnetic flux density of the specimen. The measured MFL signals were used to interpret the healthy condition of the steel cable. For improving the resolution and quantification of the damage level, digital signal processing techniques were performed. In addition, the measured MFL signals were visualized into a 3D MFL map for real-time and online cable monitoring. This visualized MFL map can provide the information about location, shape and size of damages very intuitively. Finally, the results were compared with information on actual inflicted damages to confirm the accuracy and effectiveness of the MFL based cable inspection system.

Tensile Tests on Flexible Steel Cable and Cable Ends

1931 ◽  
Vol 17 (68) ◽  
pp. 259-260
Author(s):  
James C. Stewart ◽  
L. Reeves
Keyword(s):  
Tensile Tests ◽  
Steel Cable ◽  
Steel Cables

The following table is the result of a series of tests carried out at East London College (University of London) on various methods of mounting flexible steel cables, in cable ends.The specimens were kindly supplied by Messrs. T. W. K. Clarke and Co.Cables Nos. 1 and 3 were fixed in the following manner. The ends were knotted and tinned, then inserted in sockets or cable ends, and solder run in.

scholarly journals CASE STUDY ON PERFORMANCE MONITORING AND STABILITY ANALYSIS OF BAISHIHU SUSPENSION BRIDGE AND SIDE SLOPE

2022 ◽  
Vol 28 (2) ◽  
pp. 81-92
Author(s):  
Chihcheng Chen ◽  
Ban-Jwu Shih ◽  
Ching-Jiang Jeng
Keyword(s):  
Steady State ◽  
Stability Analysis ◽  
Slope Stability ◽  
Performance Monitoring ◽  
Three Dimensional ◽  
Suspension Bridge ◽  
Steel Beams ◽  
Steel Cable ◽  
Final Steady State ◽  
Steel Cables

The main structure of the Baishihu suspension bridge was connected to the anchor foundations by three main steel cables. The wooden pedestrian deck was fixed to the main steel cables using steel beams and was stabilized by two stabilizing cables. The stabilizing cables and bridge body were joined by 44 steel connecting rods. Therefore, the slope stability at the anchorage foundations of the main steel cables, as well as the performance monitoring and analysis of the main steel cables and stabilizing cables, are critical to the overall performance of the suspension bridge. This paper discusses the performance monitoring and analysis of the steel cable deflection and cable strength for this bridge, as well as the main considerations and results of the stability analysis of the bridge abutments and side slopes of the two banks. Water-level observation wells, inclinometers, and tiltmeters monitoring were used to record reference data for the analysis of the slope stability performance. Additionally, the three-dimensional dynamic analysis program VFIFE was used to analyze the deformation and motion of the bridge. The final steady-state results were used to compare the static design value and monitoring data. The dynamic response before the final steady state was also observed.

Sign in / Sign up

Export Citation Format

Share Document