scholarly journals Analytical solution for nonlinear vertical vibration model of mill roll system based on improved complexification averaging method

2016 ◽  
Vol 18 (8) ◽  
pp. 5521-5536 ◽  
Author(s):  
Wan-lu Jiang ◽  
Yong Zhu ◽  
Xiang-dong Kong ◽  
Hao-nan Wang
Keyword(s):  
Analytical Solution ◽  
Averaging Method ◽  
Vertical Vibration ◽  
Mill Roll ◽  
Vibration Model ◽  
Roll System

Research on Dynamic Load Coefficient Based on the Airfield Pavement Roughness

2011 ◽  
Vol 97-98 ◽  
pp. 386-390 ◽  
Author(s):  
Xian Min Zhang ◽  
Li Li Sun ◽  
Chun Fei Hu ◽  
Zhi Chao Sun
Keyword(s):  
Analytical Solution ◽  
Dynamic Load ◽  
Aircraft Landing ◽  
Pavement Roughness ◽  
Vibration Model ◽  
Allowable Level ◽  
Aircraft Landing Gear ◽  
Dynamics And Vibration ◽  
The Impact ◽  
The Relationship

It applies flight dynamics and vibration principle to create vibration model of aircraft landing gear considering aircraft tire damping, and get the equation of analytical solution based on the impact on airfield pavement roughness. It studies the relationship between dynamic load coefficient and time and speed and roughness. For a special aircraft, it gives the allowable level for pavement roughness based on the influence of pavement and passengers comfort.

Comparison of Vertical Model and Spatial Model for Vehicle-Track-Bridge Coupling Vibration System

2011 ◽  
Vol 243-249 ◽  
pp. 4307-4310
Author(s):  
Yuan Zhang ◽  
Wei Lin ◽  
Ze Ming Wang
Keyword(s):  
Vertical Vibration ◽  
Coupling Vibration ◽  
Spatial Coupling ◽  
Advantages And Disadvantages ◽  
Vibration Model ◽  
Spectrum Density ◽  
Exciting Source ◽  
Vibration Responses ◽  
Track Bridge ◽  
Bridge System

In this paper, models for vertical and spatial coupling vibration of vehicle-track-bridge system are established separately. The track vertical irregularity sample in time domain is established by power spectrum density and taken as the exciting source to analyze the coupling vibration of vehicle-track-bridge system of two models. The advantages and disadvantages and applicability of the vertical vibration model and the spatial vibration model are analyzed by comparing the vertical vibration responses of the two models under excitation with same level of track vertical irregularity.

Study of Dynamic Analysis Model on Subway Vehicle-Tunnel Vertical Coupled System

2012 ◽  
Vol 170-173 ◽  
pp. 1497-1503
Author(s):  
Bo Liang ◽  
Hong Luo ◽  
Wei Qing
Keyword(s):  
Dynamic Analysis ◽  
Coupled System ◽  
Coupling Model ◽  
Vertical Vibration ◽  
The Body ◽  
Analysis Model ◽  
Vibration Equation ◽  
Vibration Model ◽  
Dynamic Coupling Model ◽  
Tunnel System

In this paper, vehicle systems and track-tunnel system are regarded as an interactional, mutual coupling overall system and the interaction between wheel and rail is regarded as the “ligament” of these two subsystems. The vehicle vibration model and vibration equation are established by considering the body vertical vibration, a suspension of vertical vibration and wheelset vertical vibration. By the displacement compatibility condition of the vehicle and track, integrating the vehicle equations and discretized track-tunnel vibration equation, the dynamic coupling model and the equations that reflect the vehicle-track systematicness is constituted. It provides a reference for the further research of the dynamic analysis of vehicle-tunnel coupled system.

Resistance of Soil to a Vertically Vibrating Pile

2013 ◽  
Vol 712-715 ◽  
pp. 979-983
Author(s):  
Zhan Shi Gao ◽  
Qing Ren
Keyword(s):  
Slenderness Ratio ◽  
Damping Ratio ◽  
Large Diameter ◽  
Three Dimensional ◽  
Horizontal Displacement ◽  
Vertical Vibration ◽  
Vibration Model ◽  
Couple Effect ◽  
Soil Dynamic ◽  
Strain Model

Based on the plane strain model, a three-dimensional vibration model was setup for soil dynamic response of soil surrounding large diameter pile. An accurate analytical solution was got by considering the couple effect of vertical and horizontal displacement of soil. Through the discussion parameters slenderness ratio (L/d), hysteretic damping ratio (Ds,Dv) and soil Poisson's ratio (ν),it is concluded that they are very important for the vertical vibration propproperties of soil impedance.

Control and Simulation on Vertical Vibration of Subway Rail via Magnetorheological Isolators

2012 ◽  
Vol 482-484 ◽  
pp. 1313-1316
Author(s):  
Rui Li ◽  
Li Min He ◽  
Xue Qin Li ◽  
Ke Long Chen
Keyword(s):  
Low Frequency ◽  
Vertical Vibration ◽  
Vibration System ◽  
Medium Frequency ◽  
Slab Track ◽  
Vibration Model ◽  
Active Vibration ◽  
Force Transmissibility ◽  
Stiffness Characteristics ◽  
Isolation Performance

A semi-active vibration system via magnetorheological (MR) isolators can contribute to enhance isolation performance. In this study, a vertical vibration model of subway rail via MR isolators was proposed. The adjustable damping and stiffness characteristics of isolator were also analyzed. Based on a floating slab track (FST) isolation model, a variable domain fuzzy control system was proposed to decrease the vertical vibration force. The results simulated in MATLAB indicate that compared with passive isolators, FST system via MR isolators decease vertical vibration force transmissibility ratio to 40% at low frequency (15Hz) and to 31% at medium frequency (30Hz).

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