Achievements in Breeding of Romanian Clonal Pear Rootstocks

Mazilu, C.

doi:10.17660/actahortic.2002.596.53

Cited by 2 publications

(2 citation statements)

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“…When introducing the complex quantities (20)(21) in the equations of motion (7-9, 11-12 and 15-16), the result is a set of linear nonhomogeneous algebraic equations, with variables in the complex amplitudesP k of the coordinates in the vehicle motions and of the suspended equipment, which can be written under a matrix form…”

Section: The Frequency Response Functions Of the Vehiclementioning

confidence: 99%

“…it features more anti-resonance frequencies). As a speed function, the anti-resonance frequencies can reach a point to coincide with the frequency of one of the natural vibration modes of the vehicle, when its influence is diminished a great deal, which explains why the vibrations regime of the vehicle does not increase along with the velocity [21,22] This fact is noticeable in the diagrams of Fig. 3, where the level of vibrations in the carbody at the resonance frequency of bending --no equipment; --rigid fixed equipment; --elastically suspended equipment changes very much in dependence on velocity for all three cases -a model with no suspended equipment; rigid fixed equipment; elastically suspended equipment.…”

Section: The Numerical Analysis Of the Regime Of Vibrations In The Vementioning

confidence: 99%

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Influence of Suspended Equipment on the Carbody Vertical Vibration Behaviour of High-Speed Railway Vehicles

Dumitriu¹

2016

Archive of Mechanical Engineering

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The equipment mounted on the carbody chassis of the railway vehicles is a critical component of the vehicle in terms of ride comfort. The reason for that is their large mass, able to visibly influence the vibrations mode of the carbody. The paper examines the influence of the equipment upon the mode of vertical vibrations of the carbody in the high-speed vehicles, reached on the basis of the frequency response functions of the acceleration in three carbody reference points -at the centre and above the bogies. These functions are derived from the numerical simulations developed on a rigid-flexible coupled model, with seven degrees of freedom. As a rule, the results herein prove the influence of the equipment mounting mode (rigid or elastic), along with the speed regime, upon the level of vibrations in the carbody reference points, at the resonance frequency of the symmetrical bending mode. Similarly, it is also demonstrated how the equipment mass and the damping degree of the suspension system affect the level of the vibrations in the carbody.

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Section: The Frequency Response Functions Of the Vehiclementioning

confidence: 99%

Section: The Numerical Analysis Of the Regime Of Vibrations In The Vementioning

confidence: 99%