Design of Particle/Granules Damper for Vertical Vibration with Approximate Analysis

Inoue, Masanobu; Yokomichi, Isao; Hiraki, Koju

doi:10.1299/jsdd.7.367

Cited by 5 publications

(6 citation statements)

References 7 publications

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“…Widely used are fl at models, known as "one-half-car model" (Gopala Rao & Narayanan, 2008). The calculation scheme of the trailer is based on the decomposition of the general scheme on a number of partial lower orders (Mikishev & Rabinovich, 1968;Stotsko, Diveyev, Sokil & Topilnytskyy, 2006;Inoue, Yokomichi & Hiraki, 2013).…”

Section: Formulation Of the Problemmentioning

confidence: 99%

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Dynamic properties of scre--bolts connections of sowing machine

Snitynskyy

Kernytskyy

Diveyev

et al. 2019

srees

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A vehicle is a complicated system under the influence of vibration caused by an inequality of the road surface, variable speed, unbalance of the rotating elements. The main factors influencing the relaxation of threaded connections (TC) are the amplitude, frequency and gradient of vibration. Although the frequencies of these oscillations are distributed over a wide range, the general effects of dynamic loading on bolted connections are similar. Main effects: (1) loosening the nut/bolt and (2) failure due to fatigue failure. The analysis of the technological process of agricultural machinery shows that the main external factors influencing their work are the profile of the surface of the field, the hardness and moisture of the soil, the speed of the unit, the instability of the engine, the traction of the wheels of the tractor and others. To study the integrity of TC, which is tested on the stand, consider the design scheme of nonlinear oscillations of the design in the presence of gaps in the TC. The study was conducted in two modes of movement of the drill: with tightened bolts and weakened bolts. For the survey, the method of spectral analysis of multidimensional periodically non-stationary random signals was used. In the process of testing, the dynamic loading of bolted joints installed on the respective knots and components of the drill was evaluated. From the conducted research it follows that the maximum vibrations acting on the TC of the drill may be in the vicinity of high-frequency resonances of TC. In parallel, nonlinear mathematical models of the oscillations of the seeder and the weakened TC were developed. The theoretical results qualitatively correspond to the experimental data.

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Section: Formulation Of the Problemmentioning

confidence: 99%

“…To simulate the dynamics of grain in the hopper, apply a SDOF model. In Inoue et al (2013), such a model is called the equivalent of single granules (ESG). Comparing measurements, the simulation provides close matching of measurements throughout the frequency range.…”

Section: Modelling Of Vibration Damages In Seedersmentioning

confidence: 99%

Dynamic properties of scre--bolts connections of sowing machine

Snitynskyy

Kernytskyy

Diveyev

et al. 2019

srees

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“…They are used in different machines and structures; differ in weight and dimensions, design features, application ranges. An example of the different locations of DVA is analyzed in [1][2][3][4][5][6][7][8][9].…”

Section: Analysis Of Recent Research and Publicationsmentioning

confidence: 99%

“…-to provide highly efficient absorption of energy of mechanical vibrations of the system; -to prevent the occurrence of resonant oscillations in the area of the calculated frequencies, which are selected around the frequencies of the most intense oscillations of the rotor machine. The procedure for calculating the dynamics of a container with balls is given in [6][7][8]. Dynamic equilibrium balloons in a container are reduced to a single mass model, the parameters of which depend on the geometry of the container, the degree of its filling, and the material of the balloons.…”

Section: Vibration Protection Devices In Suspension Using Dvamentioning

confidence: 99%

Lightweight design and crash analysis of composite frontal impact energy absorbing structures

Obradovic

Boria

Belingardi

2012

Composite Structures

226

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Carbon fibre composites have shown to be able to perform extremely well in the case of a crash and are\ud being used to manufacture dedicated energy-absorbing components, both in the motor sport world and\ud in constructions of aerospace engineering. While in metallic structures the energy absorption is achieved\ud by plastic deformation, in composite ones it relies on the material diffuse fracture. The design of composite\ud parts should provide stable, regular and controlled dissipation of kinetic energy in order to keep the\ud deceleration level as least as possible. That is possible only after detailed analytical, experimental and\ud numerical analysis of the structural crashworthiness.\ud This paper is presenting the steps to follow in order to design specific lightweight impact attenuators.\ud Only after having characterised the composite material to use, it is possible to model and realise simple\ud CFRP tubular structures through mathematical formulation and explicit FE code LS-DYNA. Also, experimental\ud dynamic tests are performed by use of a drop weight test machine.\ud Achieving a good agreement of the results in previously mentioned analyses, follows to the design of\ud impact attenuator with a more complex geometry, as a composite nose cone of the Formula SAE racing\ud car. In particular, the quasi-static test is performed and reported together with numerical simulation of\ud dynamic stroke. In order to initialize the collapse in a stable way, the design of the composite impact\ud attenuator has been completed with a trigger which is consisted of a very simple smoothing (progressive\ud reduction) of the wall thickness. Initial requirements were set in accordance with the 2008 Formula SAE\ud rules and they were satisfied with the final configuration both in experimental and numerical crash\ud analysis

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“…The dampers are devices that dissipate energy. The particle impact damper is one of the damper using particles [1,2]. Using this damper, vibration energy is dissipated by collisions of both particle-particle and particle-wall.…”

Section: Introductionmentioning

confidence: 99%

Influence of Installation Angle of a Damper Using a Magnetic Particle Assemblage on Damping Force under Applied Magnetic Field

Kawamoto

Ido

Hayashi

2015

Journal of the Japan Society of Applied Electromagnetics and Me

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Damping force of the damper using a particle assemblage depends on installation angle of the damping due to gravity acting on the particles and existence of space in the container of the damper. In order to suppress such dependency of installation angle, magnetic particles are used as particle assemblage in the damper and magnetic field is applied by using two electromagnets or permanent magnets. It is shown that the effect of installation angle on the damping force is reduced by using applying magnetic field.

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Design of Particle/Granules Damper for Vertical Vibration with Approximate Analysis

Cited by 5 publications

References 7 publications

Dynamic properties of scre--bolts connections of sowing machine

Dynamic properties of scre--bolts connections of sowing machine

Lightweight design and crash analysis of composite frontal impact energy absorbing structures

Influence of Installation Angle of a Damper Using a Magnetic Particle Assemblage on Damping Force under Applied Magnetic Field

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