In this paper, we present a phenomenological model that predicts the size distribution of the product issued from impact crushing in function of the rotor strike radius and velocity, the material...
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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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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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For example, Wu et al. (2021) used the BPM model to simulate the crushing state of iron ore and studied the influence of operation parameters, such as bottom angle of the mantle, length of the ...
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Download Citation | Exploring Cone-shaped Solitons, Breather, and Lump-forms Solutions using the Lie Symmetry Method and Unified Approach to a Coupled Breaking Soliton Model | In this research ...
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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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In this thesis a method for prediction of cone crusher performance is presented. The model is based on the laws of mechanics and constitutive relations concerning rock breakage characteristics. There are some crucial assumptions which are of central interest for the model. The validity of these assumptions has been verified by full-scale tests.
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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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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. After that, the effects of various parameters on the ice-breaking resistance were analyzed by the developed model.
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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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In this thesis a method for prediction of cone crusher performance is presented. The model is based on the laws of mechanics and constitutive relations concerning rock breakage...
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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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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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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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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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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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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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breaking parameters by using the empirical formula fitted by artificial neural network, and simulated interaction between the cone and level ice by Bullet physics engine. The remaining parts of this paper are organized as follows: Section2introduces the calculation principle of physics engine and the setting of ice-breaking model.
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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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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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(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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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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The conical nozzle has no the exit section. According to previous research [16,17], under the same operating conditions, the parameters of the straight cone nozzle and the conical nozzle are also the same, but the former has better jet performance. Figure 3 presents a cutaway view of the 3D model of the straight cone nozzle. The straight cone ...
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Composite cone single cone bit is a new type of single cone bit based on spherical single cone bit. Its unique structure changes the rock breaking method of traditional single …
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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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In this anlysis it is also assumed that the air mass loading on the cone (the mass of air in contact with the cone) and the radiation resistance (energy transmit-ted to air as sound waves) is lumped in with the model mass and mechanical resistance terms. 1 This follows from the relationship between speed of propagation of sound in air V air,
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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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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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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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