Proof of concept of a novel frictional shock absorber; analytical model and experimental analysis

Maureira-Carsalade, Nelson; Villagrán-Valenzuela, M.; Sanzana-Jara, D.; Roco-Videla, Ángel

doi:10.1016/j.engstruct.2020.111657

Cited by 4 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adjustment of parameters was carried out using a procedure that seeks, as an objective, to determine the value of said parameters that minimizes an error objective function between the experimental and numerical results, as described by Maureira-Carsalade et al [17]. The algorithm consists of defining vectors with values of the input variables that are sought to adjust with experimental results, finding these within the neighborhood of the expected value of each variable.…”

Section: Validation Of the Numerical Model And Adjustment Of Its Para...mentioning

confidence: 99%

“…Recognizing this challenge, researchers have shifted their focus towards developing dampers with built-in self-centering capabilities, offering a comparative advantage over traditional frictional dissipators [14]. Examples include a vertical-shear self-centering damper for enhancing seismic performance [15], self-centering friction spring dampers for seismic resilience [16], shock absorbers with a self-centering capacity [16], self-centering dampers and bar centering within columns [17], a self-centering damper based on shape memory alloy wires [18], a seismic bracing system based on a superelastic shape memory alloy ring [19], an asymmetrical friction damper to improve the seismic behavior of tension-only braces [20], and a slack-free connection to improve the seismic behavior of tension-only braces [21], among others. Some seismic isolation devices also provide frictional dissipation and have self-centering capabilities, such as the wire rope isolator [22,23].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of the Analytical Model of an Energy Dissipator and Validation with Experimental Tests of a Prototype

Balboa-Constanzo,

Maureira-Carsalade,

Sanhueza-Espinoza

et al. 2023

Buildings

View full text Add to dashboard Cite

An improved numerical formulation for a self-centering frictional damper is presented. This was experimentally validated through quasi-static tests carried out on a steel-made prototype of the damper. Its design is ad hoc for implementation in the seismic protection of industrial storage racks. The conceptual model of the device was adjusted to the prototype built. The formulation of the analytical model, a parametric analysis of it, and the validation with experimental results are presented. The improvement of the model presented here explicitly considers elements included in the prototype, such as a system of load transmission rings and the friction between all of the components that slide or rotate relatively. In the experimental validation, the parameters of the improved model were determined. The numerical predictions for the improved model were contrasted with those obtained with the original one and with the experimental results. This demonstrates that the improvement leads to a better adjustment of the numerical predictions concerning the experimental measurements, which is useful for nonlinear analysis. The device withstood forces of considerable magnitude in addition to dissipating enough energy per load–unload cycle to be effective in the seismic protection of industrial storage racks.

show abstract

Section: Validation Of the Numerical Model And Adjustment Of Its Para...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of the Analytical Model of an Energy Dissipator and Validation with Experimental Tests of a Prototype

Balboa-Constanzo,

Maureira-Carsalade,

Sanhueza-Espinoza

et al. 2023

Buildings

View full text Add to dashboard Cite

show abstract

“…Recurrent impact protection devices usually need to dissipate large amounts of energy to prevent damage to the infrastructure they protect. 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].…”

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

View full text Add to dashboard Cite

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.

show abstract

A novel design of journal bearings for stability under shock loads

Hong

2024

Sci Rep

View full text Add to dashboard Cite

Mechanical systems are expected to operate under various load conditions, and it is necessary to use a lubrication system to achieve reliability and stable performance. Journal bearings, which are used to achieve such stable lubrication, are representative of hydrodynamic lubrication bearings. In this study, groove-shaped structures and rubber were applied to the ends of the bearings to ensure stable lubrication performance under conditions where, for various reasons, shock loads are applied in addition to static loads under misaligned conditions. The groove structure and rubber contribute to stable lubrication performance by preventing contact between the shaft and bearing as well as absorbing shock loads through elastic deformation of the groove’s end due to oil film pressure. This novel design, which utilizes groove-type flexible structures and rubber, led to journal bearings that exhibited improved lubrication performance under various shock load conditions. When a shock load is applied to a mechanical system, the design proposed in this study contributes to improving the reliability of the mechanical system by enhancing its lubrication performance. Supplementary Information The online version contains supplementary material available at 10.1038/s41598-024-73178-1.

show abstract

Proof of concept of a novel frictional shock absorber; analytical model and experimental analysis

Cited by 4 publications

References 40 publications

Improvement of the Analytical Model of an Energy Dissipator and Validation with Experimental Tests of a Prototype

Improvement of the Analytical Model of an Energy Dissipator and Validation with Experimental Tests of a Prototype

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

A novel design of journal bearings for stability under shock loads

Contact Info

Product

Resources

About