Modeling and Analysis of Vehicle-Track Dynamic Behavior at the Connection between Floating Slab and Non-Floating Slab Track

AbstractIn this article, we introduce fractional-order Solow-type models as a new tool for modeling and analysis in mathematical finance. Sufficient conditions for the Mittag–Leffler stability of their states are derived. The main advantages of the proposed approach are using of fractional-order derivatives, whose nonlocal property makes the fractional calculus a suitable tool for modeling actual financial systems as well as using of impulsive perturbations which give an opportunity to control the dynamic behavior of the model. The modeling approach proposed in this article can be applied to investigate macroeconomic systems.

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Modeling and analysis of dynamic behavior of tilting vehicle

10.4271/2007-01-2869 ◽

2007 ◽

Cited By ~ 2

Author(s):

Rodrigo de Souza Vieira ◽

Rafael Sangoi Padilha ◽

Lauro Cesar Nicolazzi ◽

Nestor Roqueiro

Keyword(s):

Dynamic Behavior ◽

Modeling And Analysis

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Modeling and analysis of the dynamic behavior of the XlnR regulon in Aspergillus niger

BMC Systems Biology ◽

10.1186/1752-0509-5-s1-s14 ◽

2011 ◽

Vol 5 (Suppl 1) ◽

pp. S14 ◽

Cited By ~ 6

Author(s):

Jimmy Omony ◽

Leo H de Graaff ◽

Gerrit van Straten ◽

Anton J B van Boxtel

Keyword(s):

Aspergillus Niger ◽

Dynamic Behavior ◽

Modeling And Analysis

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Numerical Modeling and Analysis of Flexure-Pivot Tilting-Pad Bearing

Journal of Tribology ◽

10.1115/1.4036275 ◽

2017 ◽

Vol 139 (5) ◽

Author(s):

Junho Suh ◽

Alan Palazzolo ◽

Yeon-Sun Choi

Keyword(s):

Dynamic Behavior ◽

Reynolds Equation ◽

Critical Role ◽

Three Dimensional ◽

The Novel ◽

Fe Method ◽

Fluid Force ◽

Modeling And Analysis ◽

Ehd Lubrication ◽

Fluid Film Thickness

This paper presents a new approach for modeling flexure-pivot journal bearings (FPJB) employing a three-dimensional (3D) elasto-hydro-dynamic (EHD) lubrication model. The finite element (FE) method is adopted for an analysis of the (1) pad-pivot dynamic behavior and the (2) fluid force. The isoviscosity Reynolds equation is utilized to calculate the fluid force acting on a flexure-pivot pad bearing and spinning journal. Computational efficiency is achieved utilizing modal coordinate transformation for the flexible pad-pivot dynamic analysis. Fluid film thickness plays a critical role in the solution of Reynolds equation and is evaluated on a node-by-node basis accounting for the pad and web deflections. The increased fidelity of the novel modeling approach provides rotating machinery designers with a more effective tool to analyze and predict rotor–bearing dynamic behavior.

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The Influence of Tread Hollowing of the Railway Wheels on the Hunting of a Coach

Volume 11: New Developments in Simulation Methods and Software for Engineering Applications; Safety Engineering, Risk Analysis and Reliability Methods; Transportation Systems ◽

10.1115/imece2010-37832 ◽

2010 ◽

Author(s):

H. Tavakkoli ◽

R. Ghajar ◽

J. Alizadeh K.

Keyword(s):

Dynamic Behavior ◽

Plastic Flow ◽

Lateral Displacement ◽

Main Topic ◽

Surface Material ◽

Wheel Surface ◽

Modeling And Analysis ◽

Railway Wheel ◽

Railway Wheels

A railway wheel has subjected to millions of intense wheel-rail contact cycles in its lifetime. Due to these severe contacts, wheel surface has worn gradually to a hollow shape. Also, tread hollowing rarely has occurred by plastic flow of surface material. Tread hollowing major consequences are false flange and different rolling radius of the wheels on a wheelset. False flange queers vehicle steerage and rolling radius differences can advance vehicle instability. This paper investigates the effect of tread hollowing, in the form of false flange and rolling radius difference, on the dynamic behavior of a railway coach. Modeling and analysis of the coach equipped by hollow wheels is performed using Adams Rail software. This study is conducted following on the problem appeared after operation of the newly purchased passenger coaches by the Iranian railways. So, the main topic which is focused on is the lateral displacement of the coach. Finally, results are reported and compared to achieve a proper criterion for tread hollowing.

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Time-Domain Dynamic Modeling and Analysis of Complex Heavy-Duty Gearbox Considering Floating Effect

Applied Sciences ◽

10.3390/app11156876 ◽

2021 ◽

Vol 11 (15) ◽

pp. 6876

Author(s):

Jiulin Wu ◽

Yifan Zhou ◽

Wei Jiang ◽

Xuedong Chen

Keyword(s):

Dynamic Behavior ◽

Time Domain ◽

Planetary Gear ◽

Modeling Method ◽

Torsional Stiffness ◽

Heavy Duty ◽

Wind Turbine Gearbox ◽

Modeling And Analysis ◽

Meshing Gears ◽

The Time Domain

Expert insights into the time-domain dynamic behavior of heavy-duty gearboxes form the foundations of design evaluation and improvement. However, in the existing lateral–torsional coupling (LTC) modeling method for gearboxes that is normally used for frequency-domain dynamic behavior, the meshing forces are modeled as spring dampers with fixed acting points on the meshing gears to simulate only the transient LTC effect, and thus the steady state characteristic in the time domain cannot be obtained due to the unrealistic distortion of positions and orientations as the gear angles increase. In this paper, a novel and generally applicable LTC modeling method for heavy-duty gearboxes, mainly planetary gear sets with floating components, is proposed by using space-fixed spring dampers with floating acting points on the meshing gears to study the time-domain dynamic response and to support the dynamic design of heavy-duty gearboxes. Based on the proposed method, a LTC model of a 2 megawatt (MW) wind turbine gearbox with floating components considering the time-varying meshing stiffness, bearing stiffness, torsional stiffness, and floating effect was established. The simulated results of representative components were in accordance with experimental results on a test rig, and dynamic behavior was calculated.

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Modeling and Analysis of Electro Hydraulic Brake System Based on AMESim/Matlab

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.1994 ◽

2011 ◽

Vol 383-390 ◽

pp. 1994-1999 ◽

Cited By ~ 1

Author(s):

Zhi Lin Jin ◽

You Qun Zhao ◽

Rui Kang Shi ◽

Li Shu Guo ◽

Zheng Tang Shi

Keyword(s):

Dynamic Model ◽

Dynamic Behavior ◽

Dynamic Characteristics ◽

Single Neuron ◽

Active Safety ◽

Modeling And Analysis ◽

Hydraulic Brake ◽

Working Principle ◽

Single Neuron Pid ◽

Vehicle Active Safety

Electro Hydraulic Brake (EHB) system plays an important role for improving vehicle active safety. In this paper, the dynamic behavior of EHB system is discussed. From its working principle, a dynamic model of quarter EHB system is established based on AMESim and Matlab. To analyze performance of the proposed EHB system, the strategy of Single-Neuron PID regulation is presented and a typical numerical case is given. The results show that this strategy can obtain good performance and proper parameters can improve the dynamic characteristics of EHB system effectively.

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