Torsional Damping Systems for all relevant Powertrains – Extending current Damping Technologies

2016 ◽  
pp. 257-270
Author(s):  
A. Kooy ◽  
D. Eireiner ◽  
T. Krause ◽  
C. Herbers ◽  
B. Vögtle
Keyword(s):  
Torsional Damping ◽  
Damping Systems

scholarly journals A review on design and testing methodologies of modern freight train draft gear system

2021 ◽  
Author(s):  
Simon Wagner ◽  
Colin Cole ◽  
Maksym Spiryagin
Keyword(s):  
Soviet Union ◽  
South America ◽  
Former Soviet Union ◽  
Rolling Stock ◽  
Freight Train ◽  
Wide Range ◽  
Draft Gear ◽  
Design And Testing ◽  
Damping Systems ◽  
The Eu

AbstractRolling stock connection systems are key to running longer and heavier trains as they provide both the connections of vehicles and the damping, providing the longitudinal suspension of the train. This paper focuses on the evolution of both connection and stiffness damping systems. Focus is on freight rolling stock, but passenger draw gears are also examined. It was found that connection systems have evolved from the buff and chain system used in the pioneer railways of the 1800s to the modern auto-coupler connection systems that are in-service worldwide today. Refined versions of the buff and chain coupling are, however, still in use in the EU, UK, South America and India. A wide range of auto-coupler systems are currently utilised, but the AAR coupler (Janney coupler) remains the most popular. A further variation that persists is the SA3 coupler (improved Wilson coupler) which is an alternative auto-coupler design used mainly throughout the former Soviet Union. Restricting the review to auto-coupler systems allowed the paper to focus on draft gears which revealed polymer, polymer-friction, steel spring-friction, hydraulic draft gears and sliding sill cushioning systems. Along with the single compressive draft gear units balanced and floating plate configurations are also presented. Typical draft gear acceptance standards are presented along with modelling that was included to aid in presentation of the functional characteristics of draft gears.

Torsional damping measurements for a gearbox

2005 ◽  
Vol 19 (5) ◽  
pp. 1096-1106 ◽  
Author(s):  
S.J. Drew ◽  
B.J. Stone
Keyword(s):  
Torsional Damping

Passive Variable Friction Damper for Increased Structural Resilience to Multi-Hazard Excitations

2018 ◽  
Author(s):  
Austin Downey ◽  
MohammadKazem Sadoughi ◽  
Liang Cao ◽  
Simon Laflamme ◽  
Chao Hu
Keyword(s):  
Structural Control ◽  
Seismic Event ◽  
Active Damping ◽  
Friction Damper ◽  
Strength Based ◽  
Story Drift ◽  
Variable Friction ◽  
Wind Events ◽  
Better Than ◽  
Damping Systems

Structural control systems, including passive, semi-active and active damping systems, are used to increase structural resilience to multi-hazard excitations. While semi-active and active damping systems have been investigated for the mitigation of multi-hazard excitations, their requirement for real-time controllers and power availability limit their usefulness. This work proposes the use of a newly developed passive variable friction device for the mitigation of multi-hazard events. This passive variable friction device, when installed in a structure, is capable of mitigating different hazards from wind and ground motions. In wind events, the device ensures serviceability, while during earthquake events, the device reduces the building’s inter-story drift to maintain strength-based motion requirements. Results show that the passive variable friction device performs better than a traditional friction damper during a seismic event while not compromising any performance during wind events.

scholarly journals DESIGN AND ANALYSIS OF AN EFFICIENT SHOCK ABSORPTION SYSTEM FOR AN AGRICULTURAL ELECTRIC TRICYCLE

2020 ◽  
Vol 61 (2) ◽  
pp. 127-134
Author(s):  
Albert Suvac ◽  
Vasilica Stefan ◽  
Cristian-Gabriel Alionte ◽  
Liviu-Marian Ungureanu
Keyword(s):  
Complex Structure ◽  
Vibration Damping ◽  
Transport Systems ◽  
Rough Terrain ◽  
Absorption System ◽  
Simulation Test ◽  
Shock Absorption ◽  
Agricultural Equipment ◽  
Transport Vehicle ◽  
Damping Systems

Ecological transport systems must be provided with efficient vibration damping systems for the comfort and safety of the user. This paper analyses a shock absorption system that can be used in an individual three-wheeled transport vehicle. The vehicle has a complex structure, with an equal size of the front and rear wheels. This uniformity of dimensions between the rear and front wheels makes it easier to travel on rough terrain and manoeuvre in a folded shape. The tricycle allows aggregation with different agricultural equipment and can be used in small farms, greenhouses, solariums, meadows, orchards, etc. In this paper we simulate several models of absorption systems with different construction parameters. The strength of the system and the efficiency of shock absorption were taken into account. The best result of the simulation test for absorption systems will be the comparison with the actual physical model used by the electric vehicle.

Vibrational Control of a 2-Link Mechanism

2020 ◽  
Author(s):  
Zakia Ahmed ◽  
Sevak Tahmasian ◽  
Craig A. Woolsey
Keyword(s):  
Translational Control ◽  
High Frequency ◽  
Horizontal Plane ◽  
High Amplitude ◽  
Torsional Stiffness ◽  
Physical Parameters ◽  
Vibrational Control ◽  
Link Mechanism ◽  
Torsional Damping ◽  
Fixed Input

Abstract This paper describes vibrational control and stability of a planar, horizontal 2-link mechanism using translational control of the base pivot. The system is a 3-DOF two-link mechanism that is subject to torsional damping, torsional stiffness, and is moving on a horizontal plane. The goal is to drive the averaged dynamics of the system to a desired configuration using a high-frequency, high-amplitude force applied at the base pivot. The desired configuration is achieved by applying an amplitude and angle of the input determined using the averaged dynamics of the system. We find the range of stable configurations that can be achieved by the system by changing the amplitude of the oscillations for a fixed input angle and oscillation frequency. The effects of varying the physical parameters on the achievable stable configurations are studied. Stability analysis of the system is performed using two methods: the averaged dynamics and averaged potential.

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