Research on Finite Element Static Analysis in Mechanical Vehicle Structure Design

2014 ◽  
Vol 511-512 ◽  
pp. 606-610
Author(s):  
Xie Li
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Static Analysis ◽  
Mathematical Optimization ◽  
Optimization Method ◽  
Structure Design ◽  
Modern Computer ◽  
Optimal Value ◽  
Design Cycle ◽  
Vehicle Structure

Finite element static analysis is a method for optimizing the design. It results from the combination of mathematical optimization method and modern computer technology. It enables a certain design to get better parameters under a variety of restrictions, thus making an optimal value of design index. In the traditional design process, Based on the initial design, the designers, with their own experience or accumulated experience by others and expertise, could ultimately get a more satisfactory one through repeated experiments, comparison and improvement. Experiencing long design cycle and consuming many human and financial resources, this approach may have found a better solution, but it is generally not able to find the optimal design. Fortunately, the finite element static analysis method provides the approach to an efficiently optimal design.

The Research and Application on Optimization Design of Lifting Mechanism - The Hydraulic Cylinder Structure Design

2014 ◽  
Vol 945-949 ◽  
pp. 503-508
Author(s):  
Li Xie ◽  
Qi Sun
Keyword(s):  
Optimization Design ◽  
Lower Cost ◽  
Hydraulic Cylinder ◽  
Structure Design ◽  
Optimal Parameters ◽  
Modern Computer ◽  
Optimal Value ◽  
Design Cycle ◽  
General Mechanic ◽  
Modern Computer Technology

As general mechanic designing methods take long design cycle and consume many resources, though it could find a good design, it could not get the optimal one.Optimization design is the fruit of the combination of optimization mathematical method and modern computer technology, which enables to get the optimal parameters under various constrains, so that the optimal value could be achieved. Optimization design is a method to ensure better usability, lower cost and reducing weight and volume when normally use it. This method can also shorten the design cycle and enhance the design efficiency.

A comprehensive approach for optimal design of magnetorheological dampers

2018 ◽  
Vol 29 (18) ◽  
pp. 3648-3655 ◽  
Author(s):  
Mohammad Mehdi Naserimojarad ◽  
Mehrdad Moallem ◽  
Siamak Arzanpour
Keyword(s):  
Optimal Design ◽  
Vibration Suppression ◽  
Mathematical Optimization ◽  
Optimization Method ◽  
Global Optimum ◽  
Local Extremum ◽  
Magnetorheological Damper ◽  
Magnetorheological Dampers ◽  
Global Extremum ◽  
Element Analysis

Magnetorheological dampers have been used in automotive industry and civil engineering applications for shock and vibration control for some time. While such devices are known to provide reliable shock and vibration suppression, there exist emerging applications in which the magnetorheological dampers have to be optimized in terms of power consumption and overall weight (e.g. energy-efficient electric vehicles). Utilizing traditional optimal design approaches to tackle those issues can sometimes lead to convergence problems such as getting trapped in a local extremum and failing to converge to the global optimum. Furthermore, manufacturing limitations are usually not taken into account in the optimization process which may hamper achieving an optimal design. In this article, we present a method for optimal design of magnetorheological dampers by utilizing mathematical optimization and finite element analysis. The proposed method avoids infeasible solutions by considering physical constraints such as fabrication limitations and tolerances. This approach takes every single feasible solution into account so that the final solution would be the global extremum of the optimization cost function. The proposed approach is applied to optimize a complex magnetorheological damper structure with different types of materials such as steel and AlNiCo. In particular, we present the design of a valve-mode magnetorheological damper with AlNiCo integrated as its core. A magnetorheological damper prototype is manufactured based on the proposed optimization method and tested experimentally.

Analysis and structure optimization on buckling destabilization and wrinkling of an automobile weather-strip seal in assemblage

2019 ◽  
Vol 234 (7) ◽  
pp. 2038-2044
Author(s):  
Qian Li ◽  
Weidong Zhu ◽  
Lixin Zhang ◽  
Minghai Yuan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Method ◽  
Arc Length ◽  
Analysis Method ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Design Cycle ◽  
Critical Regions

Buckling destabilization and wrinkling of an ethylene-propylene-diene monomer automobile weather-strip seal in assemblage and its structural optimization were studied in this paper. First, an innovative approach that traces buckling bifurcation paths was developed based on an arc-length method, and algorithmic parameters of the method were defined. A finite element analysis model of the automobile weather-strip seal in assemblage was then developed and analyzed using the arc-length method. The maximum buckling load, the deformation of the seal, and the thickness decrease of the lower tube wall in the critical region where it was prone to wrinkle were obtained by this finite element analysis method. Finally, an optimization seal structure was proposed and analyzed, and the deformations and the thickness decrease of the original and optimal structures in the critical regions were compared. The analysis conclusion implies that the optimal structure is more stable. The proposed analysis and optimization method can shorten the product design cycle, improve the structural stability, and decrease the design and trial-product cost considerably.

3D Magnetic Field and Temperature Rise Analysis of Dry-Type Transformer Based on Finite Element Method

2014 ◽  
Vol 945-949 ◽  
pp. 181-184
Author(s):  
Hui Xu ◽  
Zhong Dong Yin
Keyword(s):  
Finite Element ◽  
Power Loss ◽  
Simulation Method ◽  
Optimization Method ◽  
High Heat ◽  
Working Capacity ◽  
High Mechanical Strength ◽  
Finite Element Software ◽  
Design Cycle ◽  
Grid Construction

Dry-type transformer is a high electric strength, high mechanical strength and high heat intensity transformer. With the acceleration of our city and countryside grid construction and the energy saving requirement in power industry, the application of dry-type transformer is expanding. Also, society proposes a higher standard in dry-type transformer. To improve its working capacity and reduce power loss further, we need to analyses its inner working conditions. This thesis uses finite element software ANSYS to build a model of dry-type transformer and gets its power loss and temperature distribution under different working capacity. After comparing this simulation results with experimental results, the accuracy of simulation method is proved. This simulation provides a structure optimization method of dry-type transformer. It can reduce design cycle and cost, help to spread the application of dry-type transformer.

The Weight Reduction Optimization of Jaw Crusher about Moving Jaw Based on Parametric Finite Element Analysis

2012 ◽  
Vol 619 ◽  
pp. 275-281
Author(s):  
Chun Lan Yang ◽  
Da Ming Huang ◽  
Ji Fen Xiong ◽  
Xiao Hui Liu
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Parametric Design ◽  
Weak Link ◽  
Minimum Weight ◽  
Inertial Force ◽  
Structure Design ◽  
Structure Characteristic ◽  
Element Analysis ◽  
Jaw Crusher

This paper aims at the problems of traditional compound pendulum jaw crusher including unreasonable structure design, heavy weight, low utilization of material and high cost, chooses moving jaw which is the key part of motion mechanism as the optimal design subject, uses finite element method, through statics analysis, obtains stress and displacement distribution of moving jaw that is under the action of maximum fracture force, realizes weak link and surplus part of primary structure. Based on the above-mentioned study, this article uses minimum weight of moving jaw as objective function, combines with structure characteristic of crusher, uses the ANSYS Parametric Design Language (APDL) to establish parameterization model, and combines with the optimal design module OPT, works out the minimum weight of moving jaw under the conditions of meeting intensity and stiffness. The result indicates that moving jaw is less than the original one by 27%, which saves material, reduces cost and weakens additional dynamic load that caused by inertial force of work mechanism, improves dynamics of mechanism to a cert extent, reduces the vibration of mechanism and the wear of part, and extends product service life.

On Updating of Finite Element Model Using Optimization Method

1997 ◽  
Author(s):  
Wolfgang G. Luber
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Natural Frequencies ◽  
Normal Modes ◽  
Mathematical Optimization ◽  
Element Model ◽  
Optimization Method ◽  
Mode Shapes ◽  
Initial Structure ◽  
Error Localization

Abstract An error localization and update method is presented which examines the elastic and dynamic behavior of the structure by means of deflections stemming from a discrete load case and from normal mode shapes of the structure respectively as well as the information of the change of natural frequencies. The main objective of the study is to provide an economical and reliable error localization method for aeronautical structures. A finite element model of the elastic structure must be available before testing the real structure to determine the optimal positioning of sensors. The error localization is based on sensitivity methods and on nonlinear mathematical optimization codes. Displacements for selected load cases and normal modes are taken as constraints. Minimum sizing changes with respect to the initial structure is used as objective function. Numerical examples with different structures show that the proposed methods can accurately detect the variations in stiffness in certain cases.

Frequency Optimal Design Method and Application

2011 ◽  
Vol 201-203 ◽  
pp. 1279-1283
Author(s):  
Shou Yi Bi ◽  
Xing Pei Liang
Keyword(s):  
Optimal Design ◽  
Design Method ◽  
Mathematical Problem ◽  
Three Dimensional ◽  
Mathematical Optimization ◽  
Element Model ◽  
Optimization Method ◽  
Finite Model ◽  
Design Variables ◽  
Analysis System

A program for frequency optimal design of structure composed of bar, beam, plate is developed based on finite analysis system ZR[1] that finite element model, including mesh generation of truss element, beam element and plate element, is automatically generated. Because of integrated with three dimensional CAD, specification of boundary conditions and design variables can be finished based on the three dimensional CAD model, so user need not deal with nodal and element of finite model in the procedure of forming finite model and specifying mathematical problem for optimization. This paper introduces a new method how to insert the frequency sensitivity analysis process into the structural analysis program, integrate mathematical optimization method and design structure based frequency optimization. The program is applied to the optimal design of actual engineering. The results are acceptable.

Modeling and Optimization of an Elliptical Shape Ultrasonic Motor Using Combination of Finite Element Method and Design of Experiments

2010 ◽  
Author(s):  
Hamed Sanikhani ◽  
Javad Akbari ◽  
Ali Reza Shahidi ◽  
Ali Akbar Darki
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Optimal Design ◽  
Design Of Experiments ◽  
Optimization Algorithm ◽  
Complex Structure ◽  
Optimization Method ◽  
Positioning Systems ◽  
Ultrasonic Motors ◽  
Element Method

Standing-wave ultrasonic motors are a modern class of positioning systems, which are used to deliver a high precision linear or rotary motion with an unlimited stroke. The design process should be performed through an effective optimization algorithm in order to guaranty proper and efficient function of these motors. An optimization method of ultrasonic motors is proposed based on the combination of finite element method and factorial design as a design of experiments in this study. The results show the ability of this method in optimal design of ultrasonic motors especially those which have a complex structure and multi modes operation principle.

Solid Modeling and Finite Element Analysis of Diaphragm Spring Clutch

2012 ◽  
Vol 452-453 ◽  
pp. 258-263
Author(s):  
Wei Dong Jin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Static Analysis ◽  
Structure Design ◽  
Stress And Strain ◽  
Strain Variation ◽  
Element Analysis ◽  
Modal Frequency ◽  
Spring Clutch ◽  
Ansys Workbench

Taking a kind diaphragm spring of automobile clutch as an example, a finite element analysis based on ANSYS WORKBENCH was studied and explained in this paper. Stress and strain variation of diaphragm spring was obtained by using static analysis, and each modal, frequency and amplitude was all achieved by applying modal analysis. And the results may provide a theoretical reference to improving structure design of automotive diaphragm spring clutch

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