Gear Stress Analysis and Discrete Optimization for Wheel-Legged Rover

2012 ◽  
Vol 479-481 ◽  
pp. 2511-2516
Author(s):  
Hong Bing Huang ◽  
Yong Ming Wang ◽  
Tong Hua Fan
Keyword(s):  
Stress Analysis ◽  
Discrete Optimization ◽  
Optimization Design ◽  
Parametric Design ◽  
Planetary Gear ◽  
Optimization Method ◽  
Prototype Model ◽  
Analysis Model ◽  
Element Analysis ◽  
Gear Trains

The wheel-legged rover with a double-half-revolution mechanism uses two tandem planetary gear trains to drive. Its virtual prototype model was built in COSMOS Motion software, and the mechanical data of each gears of the wheel-legged rover were obtained by dynamic simulation under the typical working conditions. On this basis, the finite element analysis model of the wheel-leg planetary gear was established and its stress analysis was done. The discrete optimization mathematical model was built with the optimization target of minimizing the rover’s wheel-leg planetary gear volume and the constraint condition of keeping the Mises stress applied on the dedendum under the admissible Mises stress. Based on ANSYS Parametric Design Language (APDL), the optimization design was done for the above gear based on discrete optimization method. The result shows that the optimized gear not only meets the strength requirement, but also its weight is 58% lower than the original, which will provide a new effective method for optimizing the wheel-leg structure of the rover.

Shafts Parameter Optimization Design for Lunar Rover Wheel-Leg Planetary Mechanism

2012 ◽  
Vol 236-237 ◽  
pp. 1258-1264
Author(s):  
Yong Ming Wang ◽  
Chuan Hui Bao ◽  
Tong Hua Fan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Design ◽  
Least Square ◽  
Dynamics Simulation ◽  
Prototype Model ◽  
Analysis Model ◽  
Element Analysis ◽  
Lunar Rover ◽  
Planetary Mechanism

Taking the wheel-legged lunar rover based on double-half-revolution mechanism as a research object, this paper has made a dynamics simulation for the simplified virtual prototype model of lunar rover under several typical road conditions, with the purpose of obtaining the mechanical data of the wheel-leg planetary mechanism shafts. On this basis, this paper established the finite element analysis model of the wheel-leg planetary mechanism shafts, and analyzed their stress by using finite element analysis software ANSYS. Based on ANSYS Parametric Design Language (APDL), the optimization design for the above shafts were done combined with the least-square approximation optimization method. The results show that the optimized shafts not only meet the strength requirement, but also their weights are about 30% lower than the original, which will provide a new and effective way for optimizing the whole wheel-leg structure of lunar rover.

Engineering Applications of Satellite Structural Optimization Utilizing ANSYS/CATIA

2011 ◽  
Vol 110-116 ◽  
pp. 1567-1575
Author(s):  
Jia Mao ◽  
Wei Hua Zhang
Keyword(s):  
Optimization Design ◽  
Parametric Design ◽  
Reference Value ◽  
Optimization Method ◽  
Design Parameters ◽  
Element Analysis ◽  
Fea Model ◽  
Satellite Platform ◽  
Weight Design ◽  
Work Done

A structured frame for the design optimization problem of satellite platform structure was established through the definition, flow and modification research of design parameters in the ANSYS/CATIA system. Problems with creating complex satellite structure FEA (Finite Element Analysis) models were discussed, including the idealization of real structure, as well as embedment of APDL (ANSYS Parametric Design Language) programme developed specially for the pre-processing and post-processing of FEA model. The optimization model was established under structural design requirements, and a graded optimization method was applied for calculation. Light-weight design schemes for two satellite platform structure were obtained through the subsequently optimization implemented using approaches put forward previously. The optimization design problems of two satellite platform structure were settled well, and work done in this paper provides certain reference value for optimization of other spacecraft structures.

Friction Type Monorail Crane Driving Design and Analysis Based on ANSYS

2014 ◽  
Vol 556-562 ◽  
pp. 1096-1099
Author(s):  
Wei Wei Tu ◽  
Han Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Analysis ◽  
Optimization Design ◽  
Three Dimensional ◽  
Structure Optimization ◽  
Element Analysis ◽  
Structure Optimization Design

This research is focused on Friction Type Monorail Crane Driving,using Solidworks software to establish three-dimensional model.Based on Ansys finite element analysis was introduced, the intensity and the structure optimization design. Monorail friction drive device is given in the stress analysis of different cross section.According to the result of the figure analyzes the stress of different locations will effect the performance of the drive.Provides a theoretical reference For optimizing the structure of improving driving devices and improving the performance of drive device.

The Study of Optimization Design Numerical Simulation on Variable Spacing Pile-Raft Foundation

2013 ◽  
Vol 353-356 ◽  
pp. 941-945
Author(s):  
Wei Yu Wang ◽  
Tuo Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Optimization Design ◽  
Analysis Model ◽  
Analysis Software ◽  
Original Design ◽  
Element Analysis ◽  
Pile Diameter ◽  
Raft Foundation ◽  
Practical Engineering

Based on practical engineering, numerical analysis model was established by using finite element analysis software. The rules about raft settlement, pile-top counterforce, soil counterforce were analysed after variable pile diameter. It is more favorable on settlement and counterforce after variable pile diameter than Original design. There is important academic significance and application value on pile raft foundation optimal design.

Structural Optimization Design on the Sunflower Shaped Arch Bridge

2013 ◽  
Vol 427-429 ◽  
pp. 90-93 ◽  
Author(s):  
Wen Qing Wang
Keyword(s):  
Optimization Design ◽  
Mechanical Response ◽  
Mechanical Performance ◽  
Orthogonal Experiment ◽  
Design Parameters ◽  
Analysis Model ◽  
Range Analysis ◽  
Element Analysis ◽  
Arch Bridge ◽  
Four Levels

Based on the principle of orthogonal test, the optimization model of sunflower shaped arch bridge scheme was set up. The five key design parameters were selected as the main factors. The four computation index, which reflect mechanical performance, were selected as analytical objects. The 16 orthogonal experiment schemes were arranged with four levels orthogonal table . The curves of the factors to the index were obtained from the mechanical response under dead load and live load through the finite element analysis model. By the range analysis method, the influential levels of the factors to the index were obtained from the result of the test , and the factor optimizatuion level of the factors was determined to further optimize the layout scheme of the sunfloawer shaped arch bridge.

Rapid Development Platform of NC Turrets Based on the Construction of B/S

2014 ◽  
Vol 685 ◽  
pp. 684-689
Author(s):  
Xiang Fu ◽  
Xi Lu ◽  
Jing Wen
Keyword(s):  
Reliability Analysis ◽  
Data Storage ◽  
Optimization Design ◽  
Parametric Design ◽  
Rapid Development ◽  
Element Analysis ◽  
Development Platform ◽  
Structural Differences ◽  
Cae Analysis ◽  
Storage Structures

NC Turrets include Servo Turrets and Power Turrets. The structural differences of them are addressed. In this paper, data storage structures of turret parts, turret automatically assembled, finite element analysis, optimization design and 3D model browse in the WEB are studied. Based on the construction of B/S, a NC Turret rapid development platform which is composed by Network user tier, WEB business tier and Data tier is constructed. The platform integrates a CAE analysis module based on ANSYS, a parametric design module based on SolidWorks and a reliability analysis module based on MATLAB. The Rapid Development Platform can perform the new product design and reliability analysis, and an optimal develpoment design of NC Turrets can be realized rapidly and efficiently.

Study on Visualization of Planetary Gear Based on Topological Theory

2011 ◽  
Vol 86 ◽  
pp. 797-800 ◽  
Author(s):  
Xiao Ying Shi
Keyword(s):  
Parametric Design ◽  
Planetary Gear ◽  
Topological Graph ◽  
Innovative Design ◽  
Model Library ◽  
Epicyclic Gear ◽  
Interaction Interface ◽  
Gear Trains ◽  
Visual Basic 6.0 ◽  
Part Model

Analyzed the topological graph based on the methods of functional fractionation, the new topological graph was established on this basis, the new graph’s exact information then can be obtained by computer. By using the software of visual basic 6.0, developed a human-computer interaction interface. The interface achieved three functions: first, we can draw the topological graph through the interface. Second, achieved the function of extract the graph’s information, finally realized the function of automatic assembly the epicyclic gear trains based on the extracted information. In order to meet the requirement of innovative design and parametric design, the author developed the part model library. At last, an example of automatic planetary gear assembly was given.

Buffer-Induced Design and Dynamic Response of Wheel Loader ROPS

2011 ◽  
Vol 314-316 ◽  
pp. 1591-1596
Author(s):  
Xiang Jun Yu ◽  
Ming Yao Yao
Keyword(s):  
Dynamic Response ◽  
Optimization Design ◽  
Large Scale ◽  
Method Comparison ◽  
Analysis Model ◽  
Element Analysis ◽  
Wheel Loader ◽  
Dynamic Finite Element Analysis ◽  
Entire Vehicle ◽  
Induced Structure

A new Rollover Protective Structure (ROPS) of the large-scale wheel loader was designed based on a buffer-induced structure. Dynamic Finite Element analysis model of the entire vehicle was created and boundary conditions of typical rollover cases were given. Optimization design of this new ROPS was obtained through a comprehensive analysis of 16 dynamic simulation samples, which were designed by Orthogonal Experimental Method. Comparison analysis of dynamic response results between original ROPS and optimal new ROPS indicates that this new ROPS effectively prolonged the duration time of the first collision and reduced the acting time of peak force. Deformation extent of main structure of this new ROPS is significantly smaller than that of the original ROPS. Buffer-induced structures can increase the kinetic energy absorption capability of ROPS. Therefore, it can reduce the possibility of brittle fracture of ROPS and improve the probability of operator survival.

Optimization design of bonnet inner based on pedestrian head protection and stiffness requirements

2017 ◽  
Vol 06 (01) ◽  
pp. 1750005 ◽  
Author(s):  
Xiongqi Peng ◽  
Purit Thanakijkasem ◽  
Xiaomin Zeng ◽  
Hongsheng Lu
Keyword(s):  
Optimization Design ◽  
Parametric Design ◽  
Optimization Method ◽  
Multidisciplinary Optimization ◽  
Fe Model ◽  
Optimization Analysis ◽  
Stiffness Analysis ◽  
Design And Optimization ◽  
Car Accidents ◽  
Head Protection

Head impact with bonnet is one of the major causes for pedestrian severe injury or fatality in car accidents. This paper proposes a multidisciplinary design optimization method for bonnet inner based on pedestrian head protection along with bonnet stiffness requirement. A finite element (FE) model of a child headform impactor is developed and verified via simulation according to Global Technical Regulation No. 9 (GTR No. 9). Static stiffness analysis and headform collision simulation against one impact point for a particular bonnet are implemented. Parametric design and optimization analysis are carried out. Optimization solution significantly achieves a better head protection effect, which clearly affirms the feasibility of the proposed multidisciplinary optimization method and provides a reference approach to optimal design of engine bonnet inner.

Improved Genetic Optimization of Electric Motorcycle Planetary Transmission

2012 ◽  
Vol 246-247 ◽  
pp. 164-168
Author(s):  
Pei Lin Yu ◽  
Wang Yong
Keyword(s):  
Planetary Gear ◽  
Optimization Method ◽  
Gray Code ◽  
Gear Transmission ◽  
Design Parameters ◽  
Preliminary Design ◽  
Genetic Optimization ◽  
Gear Trains ◽  
Planetary Transmission ◽  
Gear Drives

Determination of dedendum circle diameter of ring gear in planetary gear drives is an important issue in preliminary design of electric motorcycle transmission. Genetic optimization is used to automate preliminary design of gears by minimizing volume of gear trains. An improved genetic optimization method was applied to a planetary gear transmission of electric motorcycle. Gray code way was applied in variable binary strings for improve research efficiency. Dynamic penalty functions were introduced to the objective function for handing the design constraints. The results were compared with a enumeration method usually applied. Improved GA produced quite well results promptly supplying design parameters of a planetary gear transmission.

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