Dynamic Characteristics of a Segmented Supercritical Driveline with Flexible Couplings and Dry Friction Dampers

Huang, Zhonghe; Tan, Jianping; Liu, Chuliang; Lu, Xiong Gang

doi:10.3390/sym13020281

Cited by 16 publications

(11 citation statements)

References 32 publications

(50 reference statements)

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“…Further, the applications of the thermodynamically consistent dynamic equilibrium Equation (35) can be extended to study the friction pendulum dampers used in structural isolations [49][50][51] and other friction dampers used as an energy dissipation devices for structures against an earthquake load [52][53][54]. The dynamic equilibrium equation can also be used for investigating frictional dissipation in vibration energy harvesters [55], independent energy dissipation mechanisms in impact-pendulum [56] and in rub-impact events [57], and influence of wear-dust on contacting surfaces or on the dissipation characteristics etc.…”

Section: Discussionmentioning

confidence: 99%

Dynamic Equilibrium Equations in Unified Mechanics Theory

Lee

Rao

et al. 2021

Applied Mechanics

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Traditionally dynamic analysis is done using Newton’s universal laws of the equation of motion. According to the laws of Newtonian mechanics, the x, y, z, space-time coordinate system does not include a term for energy loss, an empirical damping term “C” is used in the dynamic equilibrium equation. Energy loss in any system is governed by the laws of thermodynamics. Unified Mechanics Theory (UMT) unifies the universal laws of motion of Newton and the laws of thermodynamics at ab-initio level. As a result, the energy loss [entropy generation] is automatically included in the laws of the Unified Mechanics Theory (UMT). Using unified mechanics theory, the dynamic equilibrium equation is derived and presented. One-dimensional free vibration analysis with frictional dissipation is used to compare the results of the proposed model with that of a Newtonian mechanics equation. For the proposed entropy generation equation in the system, the trend of predictions is comparable with the reported experimental results and Newtonian mechanics-based predictions.

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Section: Discussionmentioning

confidence: 99%

Dynamic Equilibrium Equations in Unified Mechanics Theory

Lee

Rao

et al. 2021

Applied Mechanics

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“…Satisfying the kinematic conditions of contact (7), with the help of Equations ( 3)-( 5), we obtain the relation:…”

Section: Methodsmentioning

confidence: 99%

“…In particular, dry friction damping technology is an effective means of reducing the vibration load in gas turbine engines [3,4], paddle disks [5,6], and cardan drives of helicopter tail rotors [7]. Friction effects in the so-called Coulomb damper are widely used in material mixing equipment and automatic washing machines [8].…”

Section: Introductionmentioning

confidence: 99%

Efficient Model of the Interaction of Elastomeric Filler with an Open Shell and a Chrome-Plated Shaft in a Dry Friction Damper

et al. 2022

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The results of a study of the contact interaction of an open shell and a chrome-plated shaft with elastomeric filler installed coaxially are presented. The considered contact system is a model of the original design of the shell damper of dry friction. The design feature is the following: the bearing link of the damper is a thin-walled cylindrical shell with a cut along the generatrix; the working body of the damper is elastomeric filler; a hollow chrome-plated shaft centers the damper elements and allows it to be used in technological processes with the presence of aggressive and abrasive-containing media. The mechanical-mathematical modeling of the behavior of the presented damper under the conditions of operational loads has been carried out. The idea of identifying the properties of a cut isotropic shell, which bends under the conditions of a nonaxisymmetric contact load, and a strongly orthotropic continuous shell is applied. As a result, dependences were obtained to determine the rigidity and the maximum allowable load of the damper. The effect of the coefficient of friction of the contact pairs elastomer-shell and elastomer-shaft on the damper performance properties has been studied. A technique for the quasi-static analysis of structural damping in non-mobile, non-conservative shell systems with deforming filler has been developed. The hysteresis loops of the damper under a nonmonotonic load are constructed, the dependence of the amount of dissipated energy on the cycle asymmetry coefficient is found. An analysis of the results obtained showed that the use of open shells in friction shock absorbers can significantly reduce their rigidity compared to solid shells and thereby reduce the resonant frequencies of the dynamic system. This circumstance makes such vibration isolators particularly attractive for use in superresonance vibrators as working modules of drilling shock absorbers and elastic hangers of sucker rods in oil and gas production.

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“…Te device proposed in article [35] is composed of rigid parts with articulated joints, an elastic element that allows the recovery of its shape, and an element that dissipates energy by friction. Dry friction damping technology is an efective means of cardan drives of helicopter tail rotors [36]. Friction efects in the so-called Coulomb damper are widely used in material mixing equipment and automatic washing machines [37].…”

Section: Introductionmentioning

confidence: 99%

Analytical Model of Structural Damping in Friction Module of Shell Shock Absorber Connected to Spring

Shatskyi

Velychkovych

2023

Shock and Vibration

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Vibration processes play a significant role in the modern industry. In most cases, vibration reduces strength, reliability, and durability of industrial machines, mechanisms, and structures, as well as adversely affects the health of support staff. This study presents a new dry friction shell shock absorber design. The shock absorber contains two spring sections and a friction module with an open shell and an elastic filler; at the same time, the spring sections and the friction module work in parallel. The proposed device demonstrates good damping characteristics, capable of operating under high operating loads, and at the same time has compact transverse dimensions. With a nonmonotonic loading of such a shock absorber, due to the contact interaction of the filler with an open shell, part of the energy that is supplied to the system will be dissipated. In other words, in response to the action of an external nonmonotonic loading, the phenomenon of structural hysteresis occurs in the friction module of the shock absorber. To describe the deformation of the shock absorber, a mechanical and mathematical model of a shell with a cut along the generatrix, which is the main bearing link, has been developed. By means of the technique of quasistatic analysis of structural damping in nonmobile nonconservative shell systems with a deformable filler, the hysteresis loops of the presented shock absorber are analytically described. Using them, according to the known loading history, it is possible to predict the behavior of the considered nonconservative system at any time after the start of the loading process. At each stage of the cyclic loading, the distribution of stresses and relationships between the external loading and the piston displacement was studied. Inequalities are obtained for permissible loads under which the operation of the shock absorber is safe. Such shell shock absorbers are projected to be used in the mining, oil and gas, and construction industries.

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Dynamic Characteristics of a Segmented Supercritical Driveline with Flexible Couplings and Dry Friction Dampers

Cited by 16 publications

References 32 publications

Dynamic Equilibrium Equations in Unified Mechanics Theory

Dynamic Equilibrium Equations in Unified Mechanics Theory

Efficient Model of the Interaction of Elastomeric Filler with an Open Shell and a Chrome-Plated Shaft in a Dry Friction Damper

Analytical Model of Structural Damping in Friction Module of Shell Shock Absorber Connected to Spring

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