Coupling Analysis of Temperature Field and Tower Top Displacement of Concrete Cable-Stayed Bridge

2021 ◽  
Author(s):  
Liu-Yu Zhang ◽  
Xiao-Chuan Shi ◽  
Xing-Yue Chen ◽  
Xin Jin
Keyword(s):  
Temperature Field ◽  
Coupling Analysis ◽  
Cable Stayed Bridge

The Verification of Geometry Control Method for Cable-Stayed Bridge

2014 ◽  
Vol 1065-1069 ◽  
pp. 992-996
Author(s):  
Can Huang ◽  
Yi Zhi Bu ◽  
Qing Hua Zhang
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Energy Method ◽  
Control Method ◽  
Simulation Analysis ◽  
Beam Element ◽  
Integration Process ◽  
Cable Stayed Bridge ◽  
Construction Procedure ◽  
Element Theory

Based on the energy method and beam-element theory, the nonlinear strain are considered, non-stress length and non-stress curvature of element of geometry control method are introducted in the integration process of stain energy. The static equilibrium equation of the geometry control method is established. Take the impacts of structural geometric profile induced by temporary loads and temperature field during the construction procedure are investigated, the correctness of the geometry control method is verified by the numerical simulation analysis.

Multi-Physics Coupling Analysis of Efficient Pumping Unit Linear Motor

2017 ◽  
Vol 872 ◽  
pp. 251-255
Author(s):  
Sen Wang ◽  
Yang Yang Zhao ◽  
Hong Kui Yan ◽  
Dong Ling Liu ◽  
Dong Sheng Zhao ◽  
...  
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Vibration Frequency ◽  
3D Model ◽  
Vibration Mode ◽  
Simulation Analysis ◽  
Linear Motor ◽  
Coupling Analysis ◽  
Mode Stress ◽  
Pumping Unit

Taking efficient pumping-unit linear motor as the research object in this paper, SOLIDWORK has been used to establish 3D model and analyze multi-physics of the efficient pumping-unit linear motor, including vibration mode, stress analysis and the analysis of temperature field. Through the simulation analysis, getting efficient pumping unit linear motor of the top five order vibration frequency, pressure distribution and temperature distribution, theoretical references are provided for the analysis of the efficient pumping-unit linear motor. The innovation of the article is in coupling analysis of multi-physics.

scholarly journals Research on the Electromagnetic-Heat-Flow Coupled Modeling and Analysis for In-Wheel Motor

2020 ◽  
Vol 11 (2) ◽  
pp. 29
Author(s):  
Haojie Xue ◽  
Di Tan ◽  
Shuaishuai Liu ◽  
Meng Yuan ◽  
Chunming Zhao
Keyword(s):  
Electromagnetic Field ◽  
Temperature Field ◽  
Flow Field ◽  
Weak Coupling ◽  
Working Condition ◽  
Electromagnetic Torque ◽  
Coupling Analysis ◽  
Field Coupling ◽  
Field Temperature ◽  
Coupling Factors

In this paper, a 15 KW in-wheel motor (IWM) is taken as the research object, and the coupling factors among the electromagnetic field, temperature field and flow field are analyzed, and the strong and weak coupling factors between the three fields are clarified, and by identifying the strong and weak coupling factors between the three fields, a three-field coupling analysis model for IWM with appropriate complexity is established, and the validity of the model is verified. In a certain driving condition, the electromagnetic field, temperature field and flow field characteristics of IWM are analyzed with the multi-field coupling model. The result shows that, after the IWM runs 8440 s under driving conditions, in this paper, the IWM electromagnetic torque of the rated working condition is 134.2 Nm, and IWM the electromagnetic torque of the peak working condition is 451.36 Nm, and the power requirement of the motor can be guaranteed. The highest temperature of the IWM is 150 °C, which does not exceed the insulation grade requirements of the motor (155 °C), the highest temperature of the permanent magnet (PM) is 65.6 °C, and it does not exceed the highest operating temperature of the PM, and ensures the accurate calculation of components loss and the temperature of the motor. It can be found, through research, that the electromagnetic torque difference between unidirectional coupling and bidirectional coupling is 3.2%, the maximum temperature difference is 7.98% in the three-field coupling analysis of IWM under rated working conditions. Therefore, it is necessary to consider the influence of coupling factors on the properties of motor materials when analyzing the electromagnetic field, temperature field and flow field of IWM; it also provides some reference value for the simulation analysis of IWM in the future.

Analysis of Thermal Effect on Girder with Side Main Rib Section

2014 ◽  
Vol 501-504 ◽  
pp. 495-500
Author(s):  
Niu Jing Ma
Keyword(s):  
Temperature Field ◽  
Temperature Gradient ◽  
Thermal Effect ◽  
Cross Section ◽  
Stress And Strain ◽  
Cable Stayed Bridge ◽  
The Common ◽  
Equivalent Load ◽  
Thermal Difference

According to the common girder with side main rib section of PC cable-stayed bridge with double cable planes, a computational model of two-dimension temperature field is presented. Temperature gradient of main rib, small longitudinal rib, top plate and flange plate was computed respectively, and then the stress and strain of each section are derived through plane cross-section assumption. For the cable-stayed bridge, member structure FEM is applied to compute node equivalent load and displacement, which resulted from both sunshine and seasonal thermal difference. Finally, a case study is analyzed, the results showed: computed and measured deflection of girder that result from thermal effect are very close, therefore, this method is feasible.

Finite Element Analysis of Thermal Stress for Cable-Stayed Bridge Tower with Cracks

2012 ◽  
Vol 178-181 ◽  
pp. 2085-2090
Author(s):  
Zhong Ren Feng ◽  
Jian Shen ◽  
Xiong Jiang Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Temperature Field ◽  
Thermal Stress ◽  
Element Calculation ◽  
Element Analysis ◽  
Cable Stayed Bridge ◽  
Crack Tips ◽  
Simulation Results ◽  
Bridge Tower

The application of ABAQUS in thermal stress analysis of mass reinforced concrete, focusing on the temperature field, crack propagation, ABAQUS modeling, finite element analysis approaches of thermal stress, is reviewed first in this paper. Then, based on the observation of one cable-stayed bridge pylon, a finite element analysis of existing crack tips in temperature stress is done, and the simulation results are compared with the measured ones to verify the validity and accuracy of the finite element calculation.

scholarly journals Determination of an Optimal Oil Jet Nozzle Layout for Helical Gear Lubrication: Mathematical Modeling, Numerical Simulation, and Experimental Validation

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-18 ◽  
Author(s):  
Yu Dai ◽  
Jifu Jia ◽  
Bin Ouyang ◽  
Jianeng Bian
Keyword(s):  
Temperature Field ◽  
Helical Gear ◽  
Tooth Surface ◽  
Transient Temperature ◽  
Coupling Analysis ◽  
Helical Gears ◽  
Transient Temperature Field ◽  
Fluid Coupling ◽  
Jet Velocity ◽  
Oil Jet

To provide a basic guidance for the selection of nozzle layout, a mathematical model of the impingement depth for helical gears under oil jet lubrication is established. Furthermore, computational fluid dynamics (CFD) methods are adopted to validate the effectiveness and accuracy of the derived impingement model. Firstly, the distribution characteristics of the oil volume fraction and oil-gas pressure in meshing area were obtained in flow field simulation. Meanwhile, the influence of spray angle, jet velocity, and gear ratio on lubrication effect was obtained. Then, the transient temperature field of the tooth surface was simulated by the method of thermal-fluid coupling analysis, and the lowest temperature distribution and the corresponding oil jet velocity were determined. Finally, experiments on the temperature characteristics measured by an infrared thermal imager of helical gears with different nozzle parameters were carried out in a gear test rig. The simulation results of transient temperature field are in good agreement with those obtained by experiments, and it indicates that the thermal-fluid coupling analysis method is correct and feasible to predict the temperature field of the helical gear pair under oil injection jet lubrication.

Research on Temperature Field and Temperature Stress of Large Span Concrete Cable-Stayed Bridge Girder

2012 ◽  
Vol 178-181 ◽  
pp. 2075-2080 ◽  
Author(s):  
Peng Yan
Keyword(s):  
Temperature Field ◽  
Monitoring System ◽  
Temperature Stress ◽  
Health Monitoring ◽  
Measured Data ◽  
Health Monitoring System ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Bridge Girder ◽  
Temperature Action

Bridge structure is influenced by external temperature inevitably, and hyper static structure, especially cable-stayed bridge, has complicated stress response on the effect of temperature action, which greatly increases the difficulty of structure stress analysis. For the sake of research on the influence degree of temperature action to large span concrete cable-stayed bridge girder, take Luzhou Taian Yangtze River Bridge as an example, the temperature field and temperature stress of girder are analyzed using measured data from health monitoring system. The results of finite element simulation experiment demonstrate that, the influence of longitudinal temperature distribution must be considered in large span bridge design, and the measured data of bridge health monitoring system installed are accurate.

scholarly journals Coupling Analysis of Temperature Field and Stress Field of Laser Cladding Die Steel

2020 ◽  
Vol 1676 ◽  
pp. 012082
Author(s):  
Shihang Yao ◽  
Changlong Zhao ◽  
Jun Liu ◽  
Xuxu Wang ◽  
Qiyin Lv ◽  
...  
Keyword(s):  
Temperature Field ◽  
Stress Field ◽  
Laser Cladding ◽  
Coupling Analysis ◽  
Die Steel

Finite Element Simulation of Large H-Beam in X-H Rolling Process

2012 ◽  
Vol 569 ◽  
pp. 251-255
Author(s):  
Pei Qi Wang ◽  
Qin He Zhang ◽  
Bao Tian Dong ◽  
Ru Po Ma
Keyword(s):  
Temperature Field ◽  
Shear Force ◽  
Rolling Process ◽  
Coupling Analysis ◽  
Mechanical Coupling ◽  
Compressive Stresses ◽  
Hot Rolling Process ◽  
Element Simulation ◽  
Simulation Results ◽  
H Beam

In order to research the hot rolling process of large H-beam, the thermal-mechanical coupling analysis and big distortion theory are used to simulate the whole X-H rolling process of HN900x300 by ABAQUS, in which the re-meshing technique is taken into simulation to increase the accuracy. Based on the simulation results, the stress and deflection of the roller as well as the metal flowing law and temperature field of workpiece are discussed emphatically. The results clearly show that the roller is subjected to alternating shear force and compressive stresses of three directions, and the metal of flange tends to flow from outside to inside. The simulation results are compared with the measuring results, which proves the correctness of simulation.

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