Mathematical Model of Stress-Strain State of Curved Tube of Non-Circular Cross-Section with Account of Technological Wall Thickness Variation

Pirogov, S. P.; Ustinov, Nikolay; Смолин, Н И

doi:10.1088/1757-899x/357/1/012037

Cited by 5 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We propose to use flexible tubular elements [10] in the design of the disc coulter suspension to ensure the set seeding depth. These elements have already been used in work in the modes of power loads [11] and in soil processing [12], which confirms their efficiency.…”

Section: Introductionmentioning

confidence: 59%

Disc Seeder with the System for Automative Tracking Of Sowing Depth

Kokoshin¹,

Kizurov²,

Kirgintsev³

2018

International Scientific and Practical Conference "AgroSMART - Smart Solutions for Agriculture" (AgroSMART 2018)

View full text Add to dashboard Cite

Observance of the depth of sowing of grain crops within the limits established by agro technical requirements is a guarantee of high yield. When the disc coulter moves in the soil, a variable resistance force acts on it, which affects the seeding depth and the qualitative characteristics of the shoots. Since within the same field there are different soils, the depth of sowing with the serial coulters becomes not stable. To solve this problem, the article proposes a technical solution and an automated tracking system that, in combination, ensures the uniformity of seeding depth with disc coulters. The use of a flexible tubular element in the opener coulter design makes it possible to compensate for movements from the soil resistance force in real time. In this paper, a mathematical analysis of the dependence of the influence of the seed depth on the compensating force on a flexible tubular element is made, and the maximum values of this force are determined.

show abstract

Section: Introductionmentioning

confidence: 59%

Disc Seeder with the System for Automative Tracking Of Sowing Depth

Kokoshin¹,

Kizurov²,

Kirgintsev³

2018

International Scientific and Practical Conference "AgroSMART - Smart Solutions for Agriculture" (AgroSMART 2018)

View full text Add to dashboard Cite

show abstract

“…Mechanical pressure gages are used to measure pressure in compliance with the standard documentation. However, their use is also reflected in the following studies devoted to the use of manometric tubular spring (MTS) -sensitive elements of manometers in various technical fields [1,2,3]. The use of MTS in agricultural machinery allows reducing the draught resistance of tillage machines due to vibration when interacting with soil [4], as well as increasing the quality of soil cultivation by adjusting the rack stiffness [5,6].…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis of Cultivator Modification

Черенцов¹,

Pirogov²,

Kokoshin³

2018

International Scientific and Practical Conference "AgroSMART - Smart Solutions for Agriculture" (AgroSMART 2018)

View full text Add to dashboard Cite

The paper presents the vibration analysis of 'modification' of a cultivator representing a manometric tubular spring (MTS) taking into account the rigid tip. It also considers the mathematical model of damped vibrations. The MTS dynamic model represents a thin-walled curved bar making in-plane vibrations within the central axis curvature. The MTS vibration equations are obtained according to the D'Alembert principle in projections on a normal and on a tangential component. The Bubnov-Galerkin method is used to solve the obtained equations.

show abstract

“…In the process of cultivating the soil, the working body of the cultivator is affected by the resistance forces of the soil of a variable nature, which causes the stand to oscillate. The supply of working fluid through the nozzle 3 into the cavity of the stand 2 under variable pressure leads to oscillatory movements of the shovels with a certain amplitude and frequency.The proposed design of the working body of the cultivator can reduce the traction resistance of tillage machines due to the effect of vibration when interacting with the soil, as well as improve the quality of the soil cultivation process by adjusting the rigidity of the stand[11,12].…”

mentioning

confidence: 99%

Simulation of Accident-free Operation of the Modified Cultivator

Пирогов¹,

Kokoshin²,

Cherencov

2019

KLS

View full text Add to dashboard Cite

In the process of pre-sowing tillage, cultivating shovels on various stands are widely used. The type of stand affects the energy and quality indicators of the process. However these stands have one significant drawback: with the increase in the strength of soil resistance, there may be buckling of the stand, which leads to a decrease in the quality indicators of the process. To stabilize the depth of cultivating the soil with cultivating shovels on elastic stands, while maintaining the vibration effect, is possible to achieve through the use of cultivating stands with variable stiffness, made on the basis of a flexible tubular element. The work presents the results of calculating the stresses and strains of the design of the proposed cultivator stand under loading by an external force. For research, the finite element method implemented in the ANSYS program was used. To simulate the movement of a cultivating shovel in the soil, we assumed the following - the treated soil was considered as a continuous medium. The tasks of constructing a grid model of the tubular element were solved, the horizontal component of the force exerted by the soil on the cultivator was determined, at which buckling occurs, the work of the cultivator shovel in the soil is modelled and the permissible speed is determined at which buckling of the flexible tubular element is eliminated.

show abstract

Mathematical Model of Stress-Strain State of Curved Tube of Non-Circular Cross-Section with Account of Technological Wall Thickness Variation

Cited by 5 publications

References 3 publications

Disc Seeder with the System for Automative Tracking Of Sowing Depth

Disc Seeder with the System for Automative Tracking Of Sowing Depth

Vibration Analysis of Cultivator Modification

Simulation of Accident-free Operation of the Modified Cultivator

Contact Info

Product

Resources

About