Breaking characteristics of ice cover and dynamic ice load …
In ice-covered regions, the upward–downward ice-breaking cones are applied widely to reduce the ice load on the vertical jacket offshore platforms. The ice load is affected by the diameter of cone at the water level. In particular, the sea ice can impact on the vertical portion of the platform which is beyond the covered area of the upward–downward cone under the …
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CONE CRUSHER MODELLING AND SIMULATION
Cone crushers utilize this mechanism and are the most widely used type of crusher for secondary and tertiary crushing stages in both the aggregate and ... HMCM Hertz Mindlin Contact Model MDP Mechanical Design Parameter OCP Operational Control Parameter ... Rock crushers are used for breaking rock particles into smaller fragments. Rock materials of
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Theoretical and experimental study on the
The finite element software LS-DYNA is employed to establish the model of the crushed rock with the tipped hob, and the accuracy of the model is examined by experiments, which provide a theoretical basis for the selection of a suitable tipped hob to improve rock breaking efficiency. Expand
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Evaluation of Cone- and Rod-Mediated Parameters in Dark …
A two-part exponential-linear curve was fitted to obtain values for cone decay, cone plateau, time to rod-cone break (RCB), rod intercept time (RIT), rod adaptation rate (S2), and area under the ...
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A Drilling Rate Model for Roller Cone Bit with Experimental
In view of the problem mentioned above, a new ROP model of roller cone bit is proposed by considering the pressure environment in the deep strata and rock-breaking characteristics of the teeth on roller cone bit. The new ROP model is based on single-tooth intrusion theory, and it lays foundation for real-time analysis of ROP of roller cone bit.
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Internal flow mechanism of cone-straight nozzle
Nozzle structure is proposed by many scholars for different application. And the flow properties have been investigated. For cleaning, cutting and rock breaking, cone-straight nozzle is the most commonly used, and the structure plays an important role in flow properties, cone-straight nozzle consists of conical section and throat section, the conical section is used to …
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Chamber Optimization for Comprehensive Improvement of Cone …
The chamber structure parameters of the cone crusher are the key parameters that affect the performance of the crusher. The bottom angle of the mantle α, the length of the parallel zone l, the eccentric angle γ, and the rotating speed n are determined as the design variables of the dual-objective programming model, as shown in the ...
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Numerical simulation of stable electrohydrodynamic cone-jet formation
The validation study was compared with ensure the optimization parameters of cone-jet morphology, as retained in the boundaries of Melcher-leaky dielectric model. ... this study did not consider the droplet break model. Overall, the relative permittivity of many fluids can be considered constant, and working fluid is incompressible, so the ...
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Numerical study of higher-harmonic wave loads and runup …
The same environmental parameters and cylinder diameter (D = 0.315 m) were implemented in a numerical wave tank, and the focused wave amplitude (A = 0.256 m) was used to validate the accuracy of the numerical model. A ... This indicates that the Stokes-like model works with ice-breaking cones installed. The second harmonic coefficient reaches ...
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A constitutive model of rock based on strain cone surface …
(2) Apply the strain cone surface model framework and the GA-based parameter calibration method to determine the model parameters for different rocks and confining pressures, thereby creating a database. (3) Use fitting techniques or machine learning methods to develop a mapping model from confining pressure to parameter values, including σ f ...
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(PDF) A Data-Driven Model for Ice-Breaking Resistance of …
The developed model was validated by simulating the ice-breaking process of the cone structure, and the computational results match well with the experimental ones in the literature.
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(a) Structure diagram and (b) functional principle diagram of cone …
The mathematical modeling and optimization of the parameters and working processes of a cone crusher were addressed in [22, 23].A mathematical model of the working process of a jaw crusher was ...
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(PDF) Cone Crusher Performance
direct correlations between input and output parameters. If no models are available the. ... indication that tensile failure is the dominating breaking mechanism in both jaw and cone.
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Spray cone angle prediction model considering nozzle hole …
Internal combustion engines, Cone angle, Cone angle model, Nozzle hole geometry, diesel spray. Introduction Carbon dioxide emitted from diesel engines can be reduced by using alternative fuels w ...
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Numerical investigation on the influence of cutting …
Three crucial cutting parameters, including cone angle, attack angle, and cutting depth, are analyzed as independent variables to elucidate their impact on rock breakage …
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Numerical investigation on the influence of cutting parameters …
The effects of three cutting parameters (cone angle, attack angle and cutting depth) on rock breakage are analyzed. ... extensive rock damage, low blasting energy utilization, strong ground vibrations, and back-break, have become increasingly prominent [5], [6]. These limitations render it inadequate to meet the future requirements for green ...
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The rock damage mechanism of combined rock breaking …
And the cutting parameters of conical pick and structural parameters of rock plate have been studied to influence rock breaking volume. The research result could help optimize …
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The rock damage mechanism of combined rock breaking …
The paper establishes the numerical simulation model of combined rock breaking with saw blade and conical pick based on ANSYS/LS-DYNA to research cutting parameters and rock structural parameters ...
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Particle breakage models for predicting comminution …
4 ITE AER where S is the selection function coefficient, which is a material constant. Particles will break if the P(e cum) value is higher than the initial strength attributed to the particle at the beginning of the simulation. If the particle is broken, then the fragments are generated following the Gaudin-Schumann or the Incomplete Beta size distributions.
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Discrete element modelling of relationship between ice breaking length
When the strength of sea ice is known, the parameters in the bond model and failure criterion of the DEM can be determined, which makes the DEM more suitable for simulating the failure process of sea ice. ... Therefore, the ice-breaking cone can also be defined as wide or narrow cone according to the breaking mode of ice cover. For the narrow ...
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Evaluation of Cone- and Rod-Mediated Parameters in Dark …
A total of 1329 DA curves were analyzed. Rod intercept time was the parameter that showed the greatest reliability (intraclass correlation coefficient of 0.88) and greatest association with age, AMD severity, and RPD (marginal R 2 of 0.38), followed by the rod-mediated parameters area under the curve and rod–cone break. Cone plateau appeared constant at lower RIT values but …
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Theoretical and experimental study on the penetration rate …
Roller cone bits are widely used in the oil and gas drilling industry, and their performance directly affects the drilling quality and cost (Winters et al., 1987, Warren, 1987, Kahraman et al., 2000).The drilling rate or rate of penetration (ROP) is one of the most important bit performance parameters, and a series of studies on ROP models for roller cone bits have …
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Investigation on rock breaking and optimum spacing of …
SE is one of the important parameters for evaluating rock breaking efficiency [121, 122]. For a 2D numerical simulation, ... In this paper, a continuum-discontinuum approach, FDEM, is utilized to model the rock breaking by TBM adjacent cutters. The impact of confining stress and cutter spacing on rock fragmentation, crack propagation, ...
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Deep Learning-Based Modeling of the Dark Adaptation …
Overall, cone-related parameters estimated from the LSTM NLR method exhibited superior repeatability, compared to those from the LOWESS NLR and NLR methods. All parameters except the rod-cone break (e) and RIT exhibited statistically significant differences (P < 0.001, Wilcoxon signed rank test). RIT repeatability was also compared with the ...
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CONE
sed. Breakage represents the way a single particle is broken into smaller fragm. nts. The appearance of the selection and breakage functions is rock material specific and can be …
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Multi-objective optimization of Stinger PDC cutter breaking …
To enhance the efficiency of the Stinger Polycrystalline Diamond Compact (PDC) cutter in breaking hard rocks, this study focuses on optimizing the cutter intrusion-cutting rock breaking parameters. A numerical calculation model for the rotational breaking of granite by a Stinger PDC cutter was estab …
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CONE CRUSHER MODELLING AND SIMULATION
Department of Product and Production Development Division of product development See more
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Breaking characteristics of ice cover and dynamic ice …
ice load on upward cone is larger than that on downward cone. Meanwhile, the breaking length of ice cover on upward cone is smaller than that on the downward cone. The ice load and the breaking length of ice cover are analyzed based on the DEM results and the …
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Primary break-up and atomization characteristics of a nasal …
The primary objective of this research was to extract the essential information needed for setting atomization break up models, specifically, the Linear Instability Sheet Atomization (LISA) breakup model, and alternative hollow cone models. A secondary objective was to gain visualization and insight into the atomization break up mechanism caused by the …
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Evaluation of Cone- and Rod-Mediated Parameters in …
Additional rod-mediated parameters, such as the steep-ness (slope) of the rod adaptation phase (S2) and the time to rodecone break (RCB), can provide supplementary infor-mation about underlying photoreceptor function and have been investigated thoroughly in the previous studies.14,18e20 Cone-mediated DA parameters consisting of the cone decay
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