Influence of the geometric properties of an external housing on its stress-strain state

Sharkov, O. V.; Zolotov, I. A.

doi:10.3103/s1068798x11040228

Cited by 6 publications

(4 citation statements)

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“…Basic calculation methods are described in many teaching books and monographs [16]- [18]. Main of them are: a) Navier' method, b) Levy solution, c) collocation method, d) Kantorovits-Vlassov method, e) grid method, f) plate calculations by FEM.…”

Section: Overview and Analysis Of Existing Calculation Methodsmentioning

confidence: 99%

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Calculation Method for Plates with Discrete Variable Thickness Under Uniform Loading or Hydrostatic Pressure

Aryassov

Gornostajev

Penkov

2018

International Journal of Applied Mechanics and Engineering

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The article proposes a new analytical method for the calculation of plates with constant and variable rigidity parameters. This method renders it possible to decrease the weight of the plates working under hydrostatic pressure by using variable thicknesses. Firs, a short overview of existing calculation methods and their results are compared. It is shown that all existing methods depend on boundary conditions. Then is given the theory of the proposed calculation method is described and calculations for plates with constant and variable thickness worked under uniformly loaded forces and hydrostatic pressure are made. The results are compared to the FEM calculations and experimental results obtained by a tensile test machine and special equipment. Calculation results obtained by the proposed analytical method and FEM results are very close. Deviations are not more than 11%. Deviations between theoretical calculations and experimental results depend on loading type and design of the test specimens but maximum values are not more than 17%. The proposed calculation method does not depend on the boundary conditions and can be used for plate calculations. Especially for plates with difficult design and complex loading.

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Section: Overview and Analysis Of Existing Calculation Methodsmentioning

confidence: 99%

“…The Kantorovits-Vlassov [16]- [18] method is one of the approximation methods. The plate fixed on four sides with the relation b a 1  with a distributed load is shown in Fig.…”

Section: Kantorovits-vlassov Methods For a Four Side Fixed Platementioning

confidence: 99%

Calculation Method for Plates with Discrete Variable Thickness Under Uniform Loading or Hydrostatic Pressure

Aryassov

Gornostajev

Penkov

2018

International Journal of Applied Mechanics and Engineering

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“…In this study, it is proposed to interpret the above-defined complex of existing (in standard-type burner devices) and newly proposed additional functions [25,26] for organizing processes to increase energy efficiency while expanding the flare zone with the above defined embedded functions for approximating spasmodic and evolutionary processes. The empirical method for analyzing the differences in the graphs of higher derivatives based on the approximation of the delta function made it possible to determine and specify the control actions of the automatic control system of combustion processes:…”

Section: H X a A A A A A A A A A Xmentioning

confidence: 99%

Approximation Methods for Analysis and Formation of Mechanisms for Regulating Heat and Mass Transfer Processes in Heat Equipment Systems

Alabugin¹,

Aliukov²,

Осинцев³

2020

IJHT

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The need to increase the accuracy of decisions and the depth of analysis of complex heat power systems determines the relevance of modeling and regulation of heat and mass transfer processes with the development of theoretical models and the development of a new methodology. Uncertainty of the environment increases the significance of the problems of insufficient efficiency of the available numerical approaches to the modeling of dynamic processes and the regulation of heating elements. Therefore, the aim of the article was to develop the applied aspects of the theory of solving nonlinear problems, provisions of the analytical methodology and the methods for regulating stepwise thermodynamic processes based on adapted tools for approximating generalized and step functions. The following tasks were solved: the structure of mechanisms was determined, including regulators of the energy efficiency of the flare device of the boiler unit with an expanded combustion zone; a model of integration-balancing regulation of heat transfer with four types of unsteady processes determined by indicators of changes in the direction and sign of the entropy of the effects of the regulators is proposed. Quantitative meters of energy efficiency of combustion and heat transfer processes in boiler units have been developed. Mathematical adapted and developed technical and organizational methods for solving problems: approximation of the original functions (generalized Dirac and stepwise) by a sequence of recursive periodic functions; simulation of spasmodic heat transfer processes based on step functions; structuring the mechanism for regulating heat transfer, including four types of regulators; empirical modeling of the assessment and regulation of energy efficiency, taking into account the directivity and severity of the effects of regulators displayed by derivatives of higher orders of approximation of energy efficiency functions. The results were obtained: mathematical ones were adapted and new approximation models for generalized functions were built; quantitative measuring instruments of process dynamics for regulating the technical and organizational mechanisms of heat transfer were obtained.

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“…A lot of studies consider development of exoskeletons, components, and housings [27]- [31]. One of the applications of these systems is to assist people with disabilities, but the disadvantages include a long period of training, low autonomy and high cost of the orthoses.…”

Section: Introductionmentioning

confidence: 99%

Modelling of the Human Knee Joint Supported by Active Orthosis

Musalimov

Monahov

Tamre

et al. 2018

International Journal of Applied Mechanics and Engineering

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The article discusses motion of a healthy knee joint in the sagittal plane and motion of an injured knee joint supported by an active orthosis. A kinematic scheme of a mechanism for the simulation of a knee joint motion is developed and motion of healthy and injured knee joints are modelled in Matlab. Angles between links, which simulate the femur and tibia are controlled by Simulink block of Model predictive control (MPC). The results of simulation have been compared with several samples of real motion of the human knee joint obtained from motion capture systems. On the basis of these analyses and also of the analysis of the forces in human lower limbs created at motion, an active smart orthosis is developed. The orthosis design was optimized to achieve an energy saving system with sufficient anatomy, necessary reliability, easy exploitation and low cost. With the orthosis it is possible to unload the knee joint, and also partially or fully compensate muscle forces required for the bending of the lower limb.

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Influence of the geometric properties of an external housing on its stress-strain state

Cited by 6 publications

References 0 publications

Calculation Method for Plates with Discrete Variable Thickness Under Uniform Loading or Hydrostatic Pressure

Calculation Method for Plates with Discrete Variable Thickness Under Uniform Loading or Hydrostatic Pressure

Approximation Methods for Analysis and Formation of Mechanisms for Regulating Heat and Mass Transfer Processes in Heat Equipment Systems

Modelling of the Human Knee Joint Supported by Active Orthosis

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