Vibration Modal Analysis and Structural Optimal Design of Car Rear-View Mirror Based on ANSYS

2012 ◽  
Vol 549 ◽  
pp. 848-851
Author(s):  
Zhi Ping Zhang ◽  
Han Wu Liu ◽  
Wen Tao He ◽  
Yong Hui Gao
Keyword(s):  
Optimal Design ◽  
Dynamic Characteristics ◽  
Equivalent Stress ◽  
Low Rank ◽  
Strength Analysis ◽  
Modal Frequency ◽  
Rear View Mirror ◽  
Finite Element Software ◽  
Optimizing Design ◽  
Maximum Equivalent Stress

In order to improve the safety of the moving car,we have to make simulation and analysis of the dynamic characteristics of the car rear-view mirror. We should consider, in addition to the geometric dimensions, standards and demands, a reasonable choice of the mirror size and installing position, the dynamic characteristics of the car rear-view mirror in the design of the car rear-view mirror. In this paper, we use the finite element software ANSYS to simulate the vibration frequency and vibration modals of the car rear-view mirror under the condition of excitation sources. Based on this and the strength analysis results of the rear-view mirror, we make a optimal design of the rear-view mirror structure. We get five-order vibration modals in working condition and analysis the size of displacement and deformation, and dynamic characteristics. The results show that because of the low modal frequency, the car rear-view mirror is easily inspired by the engine, powertrain system and road to vibrate. Besides, the deformation and the strain distribution of the rear-view mirror are not uniform. So we should control the low rank flexibility modal frequency within a certain threshold frequency when designing its structure. On the condition of little changes of its overall volume, the maximum equivalent stress of the rear-view mirror decreased by 30.5% through optimizing design.

scholarly journals Strength Analysis and Structure Optimization of Gate Valve Body Based on Finite Element Software

2019 ◽  
Vol 136 ◽  
pp. 03019
Author(s):  
Xiaoke He ◽  
Chenjun Zhang ◽  
Ding Tian
Keyword(s):  
Stress Concentration ◽  
Optimization Design ◽  
Gate Valve ◽  
Equivalent Stress ◽  
Strength Analysis ◽  
Valve Body ◽  
Finite Element Software ◽  
Design Variables ◽  
Maximum Equivalent Stress ◽  
Design Function

Stress concentration zone and maximumdeformation zone ofgate valve at 1.6MPaworking pressure were found out according to strength calculationand analysisby ANSYSsoftware, which proceedsthe processes of modeling, meshing, constraintsdefine, applyingloadsand solving. Design variables,state variablesand optimize targetswere defined by target optimization design function of ANSYS Workbenchin ordertoreveal the influence law of eachdesign variable onthe gate valve body equivalent stress,and the optimal valuesof design variablescould be obtained after calculation. The valve structure was improved and stress concentration was reduced from the perspective of safety and economy,whichcouldprovidea referencefor reliable valvedesign.The shape of the valve body was optimized by topology optimization design in order to achieve the rational use of materials.Researchresultsshow that the maximum stress lies on both sides of the valve rib plateand the stress is beyond thematerial allowable value, but the valve body has little deformation.After optimization the maximum equivalent stress of valve body is decreasedby23.91%and the valvebodyhasuniformstress distribution, the mass of the valve body is reduced by1.4%as well. Material utilization is improvedeffectively,which indicates that the optimizationdesignbased onANSYS Workbenchis highly efficient and reliable.

Strength Analysis of Buried Polyethylene Pipeline Under Ground Subsidence Considering Multivariate Influence

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Ying Wu ◽  
Yuan Zhang ◽  
Sixi Zha ◽  
Guojin Qin
Keyword(s):  
Strain Rate ◽  
Influencing Factor ◽  
Equivalent Stress ◽  
Element Model ◽  
Ground Subsidence ◽  
Normal Operation ◽  
Strength Analysis ◽  
Transition Section ◽  
Correlation Degree ◽  
Maximum Equivalent Stress

Abstract Due to the combined effects of natural and human factors, the ground subsidence is aggravated, which brings potential hazards to the normal operation of buried polyethylene (PE) pipelines. A variety of variables influences the safety of buried pipelines, while the existing research lacks detailed analysis on the issue. A finite element model of buried PE pipeline was developed to analyze how various factors affected the strength of PE pipeline under ground subsidence. Furthermore, the orthogonal test combined with the gray correlation degree was used to analyze the significance of each influencing factor. The results show that (1) the strain rate of the pipe is different at different ground subsidence rates, and the maximum equivalent stress of the pipe increases with the increase of the strain rate; (2) the maximum equivalent stress diminishes with the increasing wall thickness of the pipeline and the length of the transition section; and (3) the factor that has the most significant influence on the maximum equivalent stress of the pipeline is the settlement, followed by the strain rate and the length of the transition section. The internal pressure has the least influence on the maximum equivalent stress in the context of ground subsidence induced stresses.

An optimal design model for the wall thickness of the propellant tank

2019 ◽  
Vol 234 (2) ◽  
pp. 445-456
Author(s):  
Tengda Xin ◽  
Hua Wang ◽  
Cunyan Cui ◽  
Jiguang Zhao
Keyword(s):  
Optimal Design ◽  
Wall Thickness ◽  
Equivalent Stress ◽  
Design Model ◽  
Bottom Wall ◽  
Cylinder Wall ◽  
Significant Research ◽  
Maximum Equivalent Stress ◽  
Liquid Rocket ◽  
Propellant Tank

The propellant tank is a vital part for the liquid rocket, and the optimal design of the propellant tank is a significant research to develop the heavy rocket. This paper aims at providing an optimal design model for tank wall thickness. Through establishing the tank mathematical model, analyzing the stress distributions of tank, and defining the equivalent stress of tank, the wall thickness parameters of tank roof, cylinder, and bottom are obtained. The effects of tank parameters on the wall thickness are analyzed to determine the distribution rules of tank roof, cylinder, and bottom wall thickness parameters. Combined with the safety factor that is defined as the ratio of the material's ultimate stress to the maximum equivalent stress, the optimal design model with invariable tank roof and bottom wall thicknesses and variable tank cylinder wall thickness is established. Finally, the optimal design model is verified by comparing the optimal tank with the original tank. The results show that the optimal design model can effectively decrease the mass of the tank and improve the stress distribution of the tank.

Numerical Simulation of Canned Hot-Extrusion Process of Mo Powder

2011 ◽  
Vol 295-297 ◽  
pp. 1341-1346
Author(s):  
Jian Li ◽  
Jun Zhang
Keyword(s):  
Equivalent Stress ◽  
Hot Extrusion ◽  
Material Model ◽  
Extrusion Process ◽  
Equivalent Strain ◽  
Maximum Temperature ◽  
Entrance Angle ◽  
Finite Element Software ◽  
The Press ◽  
Maximum Equivalent Stress

Aiming at the stress state in the hot-extrusion process of Mo powder, the paper has studied the 3D stress characteristics provided by the hot-extrusion of the canning. The material model is established by the finite element software DEFORM-3D. Via calculating, the load-stroke curve, temperature, relative density, the equivalent stress and the equivalent strain distribution characteristics were obtained. The results show that canned powder after hot-extrusion technology can improve its density greatly. The press load grows fleetly at early, and then slowly grows at the stable stage. Only reach last stage the press load drops quickly of the hot-extrusion. The maximum temperature and maximum equivalent strain appear below the die entrance. The maximum equivalent stress appears in the die entrance. Therefore ,the die entrance angle and the surface geometric parameters of the die have significant effects on the equivalent stress.

Analysis and Optimization on the Front Supporter of Concrete Mixer Truck

2013 ◽  
Vol 385-386 ◽  
pp. 288-291 ◽  
Author(s):  
Yao Dong Gao ◽  
You Zheng Ma ◽  
Xiang Gang Kong
Keyword(s):  
Finite Element ◽  
Topology Optimization ◽  
Equivalent Stress ◽  
Size Optimization ◽  
Work Condition ◽  
Finite Element Software ◽  
Maximum Equivalent Stress ◽  
Concrete Mixer ◽  
Parameterization Model ◽  
Objective Size

The finite element software ANSYS is applied to optimize the front supporter of the concrete mixer truck. The main goal of the optimization is to reduce the quality. The statics analysis and the modal analysis of the front supporter are performed in the most dangerous work condition. The results of the two analyses are combined to explore improvement methods. Then, the topology optimization is performed to propose and establish the final shape and parameterization model. Finally, the multi-objective size optimization is performed to obtain the best optimization result. The maximum equivalent stress has reduced by 7.5%, and the quality has reduced by 13%.

Optimal Design of Triangle Fastening Screw Thread's Turn Number

2011 ◽  
Vol 314-316 ◽  
pp. 657-660
Author(s):  
Jian Min Chen ◽  
Meng Zhang ◽  
Jia Deng
Keyword(s):  
Optimal Design ◽  
Research Method ◽  
Equivalent Stress ◽  
Coupled Model ◽  
The Other ◽  
Screw Thread ◽  
Ansys Software ◽  
Axial Pressure ◽  
Maximum Equivalent Stress ◽  
Screw Threads

The paper firstly numerically simulates the coupled model of triangle fastening screw threads in the application of ANSYS software. Calculate stress intensity of the screw thread on the axial pressure of 200MPa. The fittest coupled turn number of the screw nut is designed to make sure the strength of coupled teeth and make every turn of the screw thread go on very well and also save material. The maximum equivalent stress of the screw thread changes linearly with the axial pressure. The stress of the thread's root is greater than that of the thread's top so that the root is easily damaged. The paper's research method can apply to the optimal design of the other patterns of screw thread's turn number.

scholarly journals Static analysis on spherical magnetically suspending rotor based on finite element

2018 ◽  
Vol 198 ◽  
pp. 04001
Author(s):  
Weijie Wang ◽  
Ren Yuan ◽  
Zengyuan Yin
Keyword(s):  
Finite Element ◽  
Static Analysis ◽  
Equivalent Stress ◽  
Element Model ◽  
Flow Mode ◽  
Element Analysis ◽  
Finite Element Software ◽  
Maximum Equivalent Stress ◽  
Static Mechanical ◽  
Design Speed

In this paper, the static mechanical properties of a spherical magnetically suspending rotor are studied based on the finite element analysis method. The structure of the spherical magnetically suspending rotor is designed. The characteristics of the spherical magnetically suspending rotor are analysed and the necessity of static analysis is pointed out. The main content and general flow of statics analysis are discussed. The two working modes (GUI mode and command flow mode based on APDL) of the finite element software ANSYS are compared and analysed. Then the finite element model of the spherical magnetically suspending rotor is established by the command flow method, and the detailed modelling steps are given. On this basis, the static characteristics of the spherical magnetically suspending rotor are simulated and analysed. The simulation results show that the maximum equivalent stress and rigid body displacement of the rotor are within the safety threshold at a design speed of 10000rpm.

Strength Analysis of Transitional Segment of Buckling Tubing Nearby the Packer in Vertical Well

2013 ◽  
Vol 634-638 ◽  
pp. 3599-3602
Author(s):  
Shao Li Zhang ◽  
Xin He Wang ◽  
Jiang Wen Xu ◽  
Yi Hua Dou ◽  
Hui Xia
Keyword(s):  
Stress Analysis ◽  
Equivalent Stress ◽  
Continuity Condition ◽  
Strength Analysis ◽  
Nonlinear Ordinary Differential Equations ◽  
Axial Pressure ◽  
Buckling Strength ◽  
Vertical Well ◽  
Maximum Equivalent Stress ◽  
Helical Buckling

The buckling deformation and stress distribution of the tubing nearby the packer would be seriously influenced by the packer constraints. This paper focused on the Strength analysis of transitional segment. The method to calculate the buckling deformation and the equivalent stress of transitional segment were derived considering the tubing boundary and continuity condition, adopting the fourth-order nonlinear ordinary differential equations and helical buckling strength method. This study makes up for the weakness of traditional stress analysis of the buckling tubing nearby the packer in vertical well, improves the pertinence and accuracy of stress analysis of buckling tubing. The results of analysis show that with the axial pressure increasing lead to the length of the transitional segment irregular fluctuations and the maximum equivalent stress increasing. The equivalent stress would gradually reduce and finally approach a constant.

scholarly journals Strength analysis of capacitor energy storage cabinet of monorail elevated train

2022 ◽  
Vol 355 ◽  
pp. 02055
Author(s):  
Guojing Ye ◽  
Jinsong Zhou ◽  
Bingshao Li
Keyword(s):  
Energy Storage ◽  
Working Conditions ◽  
Equivalent Stress ◽  
Element Model ◽  
Strength Analysis ◽  
Static Calibration ◽  
Simulation Calculation ◽  
Maximum Equivalent Stress ◽  
Calculation Results ◽  
Design Requirements

Based on the actual parameters of the capacitor energy storage cabinet on the top of the monorail train, built the cabinet’s finite element model. Then, according to EN 12663-1, set the calibration conditions and fatigue working conditions. Carried out the simulation calculation under different conditions, respectively. The calculation results under the static calibration conditions show that the maximum equivalent stress of each node on the model is smaller than the allowable stress under all working conditions. Therefore, the static strength of the cabinet meets the design requirements. Plotted Goodman fatigue limit diagrams of the cabinet’s base metal and weld and modified them in the Smith form. Then plotted the average stress and stress amplitude under fatigue working conditions in the corresponding scatter diagram. The diagram s show that all points are located within the permitted area. The results show that the fatigue strength of the cabinet meets the requirements of design and use.

Stress Analysis of an Annular Sector Semicircular Cross Section Vessel

2014 ◽  
Vol 574 ◽  
pp. 68-72 ◽  
Author(s):  
Qing Gang Liu ◽  
Jun Wang ◽  
Xin Qi Yu ◽  
Yan Shu Guo ◽  
Pei Ying Peng
Keyword(s):  
Stress Analysis ◽  
Cross Section ◽  
Equivalent Stress ◽  
Finite Element Software ◽  
Inner Surface ◽  
Maximum Equivalent Stress ◽  
Annular Sector ◽  
Sector Plate ◽  
Annular Sector Plate ◽  
Semicircular Cross Section

By using finite element software ANSYS, stress analysis was conducted to the annular sector semicircular cross section vessel which was made up of an annular sector plate, two semicircular plates and a semi-cylindrical with thicknesses of 20mm. The analysis results show that the maximum equivalent stress of the annular sector plate appears in the middle of the plate, and the maximum equivalent stress of the semicircular plate and the semi-cylindrical appear in the inner surface of the connections. The equivalent stress distribution trend of the annular sector plate, semicircular plates and the semi-cylindrical was obtained. Through these researches, the distribution trend of equivalent stress provided a reference for the design of the annular sector semicircular cross section vessel.

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