A5041545738- Material Properties and Applications
- Industrial Engineering and Technologies
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Mechanics and Biomechanics Studies
- Geotechnical and Geomechanical Engineering
- Mechanical and Thermal Properties Analysis
- Material Properties and Failure Mechanisms
- Engineering Diagnostics and Reliability
- Ship Hydrodynamics and Maneuverability
- Structural Integrity and Reliability Analysis
- Structural mechanics and materials
- Elasticity and Wave Propagation
- Hydraulic and Pneumatic Systems
- Engineering and Agricultural Innovations
- Engineering Applied Research
- High-Velocity Impact and Material Behavior
- Rheology and Fluid Dynamics Studies
- Coal Combustion and Slurry Processing
- Mechanical Failure Analysis and Simulation
- Neurological Disorders and Treatments
- Engineering Technology and Methodologies
- Mechanical Systems and Engineering
- Mining and Gasification Technologies
- Engineering Structural Analysis Methods
- Engineering and Environmental Studies
Kamchatka State Technical University
2021-2024
Donetsk National Technical University
2014-2018
The paper presents calculated dependences for determining the amount of thermal energy released by an elastic coupling during torsional vibrations shaft line. wall line is modeled a two-stage rod with connection sections. Active forces are acting on line: engine side, represented partial sum Fourier series and average value torque screw, as well damping moments: screw cylinder piston group in element clutch. simulation performed nominal resonant frequency engine. It has been found that...
The problem of torsional vibrations propeller shaft lines is considered in the work. A two-stage rod model with distributed parameters has been adopted for study dynamic processes contrast to traditional method based on discrete masses. active load engine side, as classical approach, approximated by partial sum Fourier series. comparison calculation results according proposed known literature performed. It established that both methods give excessive values forces and deformations resonance...
Materials and methods: a prospective non-randomized pilot multicenter study of the informativeness clinical significance hemostasis laboratory tests in 1210 patients with COVID-19 disease course, including favorable unfavorable outcomes, was performed. Hemostasis assessed using clotting D-dimer concentration, thromboelastography (TEG) thrombodynamics (TD). Results: comparison parameters picture showed that 75% have pronounced activation plasma coagulation system upon admission to hospital....
An equation for bending of a weighable rod with variable transversal stiffness was proposed. On the basis this analyses conclusions were drawn about influence parameters construction on values maximum sag and moment. The recommendations usage simplified model done. example given calculation strength according to represented mathematical models considered.
Dynamics of longitudinal impact in rods variable cross-section is considered. Rods various configurations are used as elements power pulse systems. There no single method to the construction a mathematical model on rods. The creation general for constructing goal article. An elastic rod considered with cross-sectional area varying powers law from coordinate. solution wave equation obtained using Fourier method. Special functions introduced basis recurrence relations Bessel solving boundary...
The paper considers a method for solving the problem of dynamics forced vibrations wall line based on model an equivalent elastic two-stage rod with pliable connection sections. is represented by system partial differential equations. solution equations obtained Fourier eigenfunctions orthogonal weight. It established that presence element at junction sections does not affect orthogonality eigenfunctions. influence coupling compliance coefficient natural frequency spectrum shaft estimated....
The dynamics torsional vibrations of a rod with an axial rigidity inhomogeneity. Rods different configurations are widely used for simulating stress-strain state in case static and dynamic load to the objects mechanical engineering, construction, biomechanics, etc. This work’s objective is creating general approach building mathematical models rods variable section. As object we have considered elastic rod, which changes according power law from longitudinal coordinate. process described by...
Abstract A technique to determine the rate of increase in brakeforce developed by braking device a mine suspended monorail is proposed. Based on experimental study, results analysis change brakeforces brake shoes are given.
Abstract The problem of determining the forces interaction a viscous fluid with cylindrical pipe wall is considered. It assumed that near wall, motion completely determined by forces. moves along streamline. annular element law special case Navier–Stokes equation in coordinate system. solved Fourier method Bessel functions. Considering orthogonality eigenfunctions, an for squared norm found. As example, considered when subjected to vibration. Equations have been obtained velocities and...
Propeller shafts and countershafts are bent quite often on sea river vessels. The cause of the curvature is a strong load this node ship’s power plant. In addition to bending, shafting experiences longitudinal transverse loads with dynamic static component. A large number scientific papers have been devoted study dynamics propeller shafting. However, problem has not completely solved, increase in damages during operation its intensive wear only confirm relevance further research direction....