Research on dynamic characteristics and fatigue robust optimization of integrated vehicle model

2018 ◽  
Vol 232 (14) ◽  
pp. 1982-1999
Author(s):  
Bobo Li ◽  
Huiqun Yuan ◽  
Tianyu Zhao ◽  
Guangding Wang
Keyword(s):  
Experimental Data ◽  
Robust Optimization ◽  
Dynamic Characteristics ◽  
Six Sigma ◽  
Multiple Frequency ◽  
Heavy Duty ◽  
Vehicle Model ◽  
Design For Six Sigma ◽  
Frequency Components ◽  
Simulation Results

This paper investigates the dynamic characteristics and fatigue robust optimization of heavy-duty tractor. First, this paper presents a vehicle model with sub-structure method. Based on the theory of base motion, the structure dynamic characteristics are analyzed. Second, the accuracy of the method is verified by comparing the experimental results with the simulation results. Also, the dynamic response and the transfer function of vehicle are obtained using the above methods. Combined with the experimental data, the methods of random multiple frequency components and multi-axial fatigue life are adopted to analyze the fatigue damage of the heavy-duty tractor under different road conditions. Finally, the Design for Six Sigma is used to optimize the vehicle’s structure. The results show that by using the proposed method, the dynamic characteristics of the vehicle can be analyzed accurately and effectively, robustness of the vehicle can be improved, and mass of the vehicle can be reduced.

scholarly journals Robust Optimization in HTS Cable Based on DEPSO and Design for Six Sigma

2008 ◽  
Author(s):  
Shuhong Wang ◽  
Xinying Liu ◽  
Jie Qiu ◽  
Jian Guo Zhu ◽  
Youguang Guo ◽  
...  
Keyword(s):  
Robust Optimization ◽  
Six Sigma ◽  
Design For Six Sigma

scholarly journals Robust Optimization in HTS Cable Based on Design for Six Sigma

2008 ◽  
Vol 44 (6) ◽  
pp. 978-981 ◽  
Author(s):  
Xinying Liu ◽  
Shuhong Wang ◽  
Jie Qiu ◽  
Jian Guo Zhu ◽  
Youguang Guo ◽  
...  
Keyword(s):  
Robust Optimization ◽  
Six Sigma ◽  
Design For Six Sigma

Numerical Simulations on the Aerodynamics Drag of a Tractor With a Tandem-Trailer

2006 ◽  
Author(s):  
M. Sitlani ◽  
K. Aung
Keyword(s):  
Experimental Data ◽  
Aerodynamic Drag ◽  
Vehicle Speed ◽  
Gap Size ◽  
Heavy Duty ◽  
Heavy Duty Truck ◽  
Engine Design ◽  
Closing The Gaps ◽  
Simulation Results ◽  
Present Simulation

The aerodynamic drag characteristics of a heavy duty truck with two configurations, a tractor and a single trailer, and a tractor and a tandem-trailer (two trailers), have been studied. The aerodynamic drag of a truck depends on geometry, frontal area, and the speed of the truck. The basic geometry used in the simulation is 1:8 scale Ground Transportation System (GTS). The present simulation model has a simplified geometry of GTS with a cab-over engine design with either one or two trailers. In particular, the effects of the gap between the tractor and the trailer, and the gap between the tandem trailers on the aerodynamic drag were determined. The effects of vehicle geometry, vehicle speed, and the gap size were investigated and the drag coefficients were computed. CFD software STAR-CD with an expert tool, es-aero, was used for all the analyses reported in this paper. The simulation results were validated with available experimental data and good agreements were found for vehicle speeds at highway and city limits. The results showed that closing the gaps and incorporating boat-tails at the rear of the trailer could reduce the drag by as much as 40 percent.

Design Simulation on Automatic Mechanical Transmission of Electric Vehicle

2013 ◽  
Vol 319 ◽  
pp. 605-609
Author(s):  
Yan Dong Song
Keyword(s):  
Electric Vehicle ◽  
Electric Vehicles ◽  
Dynamic Characteristics ◽  
Automatic Transmission ◽  
Drive Train ◽  
Mechanical Transmission ◽  
Vehicle Dynamic ◽  
Vehicle Model ◽  
Overall Performance ◽  
Simulation Results

By optimizing the matching of automatic transmission of car, it could improve the overall performance of electric vehicles. This article analyzes the structure of the electric vehicle drive train, then selects the automatic mechanical transmission combined with the motor-driven features. Then calculate the parameters of motors, batteries, transmission and other parts. The electric vehicle model was created in the Advisor software, then the simulation conditions were selected to test the car, so the vehicle dynamic characteristics and economy were verified by simulation results.

scholarly journals Dynamic Behavior Analysis of Intermediate Bearing-Squeeze Film Dampers-Rotor System under Constant Maneuvering Overload

2021 ◽  
Vol 2021 ◽  
pp. 1-24
Author(s):  
Nan Zheng ◽  
Mo-li Chen ◽  
Gui-Huo Luo ◽  
Zhi-Feng Ye
Keyword(s):  
Dynamic Behavior ◽  
Dynamic Characteristics ◽  
Rotor System ◽  
Squeeze Film ◽  
Nonlinear Dynamic Model ◽  
Maneuvering Flight ◽  
Squeeze Film Dampers ◽  
Frequency Components ◽  
Simulation Results ◽  
Rotor Dynamic

Under the flight maneuvering of an aircraft, the maneuvering load on the rotor is generated, which may induce the change of dynamic behavior of aeroengine rotor system. To study the influence on the rotor dynamic behavior of constant maneuvering overload, a nonlinear dynamic model of bearing-rotor system under arbitrary maneuver flight conditions is presented by finite element method. The numerical integral method is used to investigate the dynamic characteristics of the rotor model under constant maneuvering overload, and the simulation results are verified by experimental works. Based on this, the dynamic characteristics of a complex intermediate bearing-squeeze film dampers- (SFD-) rotor system during maneuvering flight are analyzed. The simulation results indicate that the subharmonic components are amplified under constant maneuvering overload. The amplitude of the combined frequency components induced by the coupling of the inner and outer rotors is weakened. The static displacements of the rotor caused by the additional excitation force are observed. Besides, the period stability of the movement of the rotor deteriorates during maneuver flight. The design of counterrotation of the inner and outer rotors can effectively reduce the amplitude of subharmonic under constant maneuvering overload.

Design for six sigma through robust optimization

2004 ◽  
Vol 26 (3-4) ◽  
pp. 235-248 ◽  
Author(s):  
P.N. Koch ◽  
R.-J. Yang ◽  
L. Gu
Keyword(s):  
Robust Optimization ◽  
Six Sigma ◽  
Design For Six Sigma

The Dynamic Modeling and Simulation on a Shell Gasifier

2013 ◽  
Author(s):  
Huisheng Zhang ◽  
Di Huang ◽  
Dengji Zhou ◽  
Shilie Weng ◽  
Zhenhua Lu
Keyword(s):  
Experimental Data ◽  
Dynamic Modeling ◽  
Dynamic Characteristics ◽  
Slag Layer ◽  
Distribution Characteristics ◽  
Layer Model ◽  
Conventional Model ◽  
Layer Method ◽  
Lumped Parameters ◽  
Simulation Results

As the conventional model of gasifier, the model based on the lumped slag layer method can only give the lumped parameters in gasifier. However, the distribution characteristics of the various parameters in gasifier is obvious. To remedy the defect in conventional model, this paper presents a compartment-slag layer model in the modeling of the shell gasifier, which takes the advantage of the lumped slag layer method and the compartment method used in the simulation of the CWS gasifier. The simulation results were validated by the experimental data. The dynamic results show that the new model can reflect the response of some key parameters. This could provide references for the future investigation of the dynamic characteristics of the IGCC system.

BEHAVIORAL MODEL OF A LINEAR VOLTAGE STABILIZER IN THE SPICE LANGUAGE

2019 ◽  
Author(s):  
Aleksey Malahanov
Keyword(s):  
Experimental Data ◽  
Behavioral Model ◽  
Voltage Stabilizer ◽  
Static Mode ◽  
Technical Description ◽  
Simulation Results ◽  
Chip Manufacturer ◽  
Linear Voltage

A variant of the implementation of the behavioral model of a linear voltage stabilizer in the Spice language is presented. The results of modeling in static mode are presented. The simulation results are compared with experimental data and technical description of the chip manufacturer.

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