Topology optimization of engine bracket arm using BESO (original) (raw)
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Topology Optimization of Lower Tie Bar Bracket of a Car Engine
2014
The paper presents some possibilities for shape design optimization that aiming to minimize mass of an analyzed part but also to uniforms distribution of a generated stresses. Here have been described computer optimization methods ’ providing guidelines for performing basic design and a way to upgrade existing designs. Applied topology optimization based on Finite Element Method application is a main topic of a paper. Here has been described an example of modeling and optimization of a car lower tie bar bracket.
Optimal design of vehicle components using topology design and optimisation
International Journal of Vehicle Design, 2004
An important problem in automotive industry is how to achieve better design concepts by considering structure performance and manufacturing cost in the early stages of product development. The topology design and optimisation provide an initial design concept for downstream applications, which leads to achieving better design by using computer-aided techniques. In this research, engine mount bracket design is presented to illustrate the application of topology optimisation approach for optimal design of vehicle components under dynamic loading conditions. The objective of the proposed research is to create an initial design concept, which has optimal structural layout. The effectiveness and verification of proposed approach are demonstrated with experimental results.
Optimization of Automotive Part Design by Using Topology Optimization Technique
2019
This paper is about to study topology optimization for automotive part design for optimized solution of our design process. Solutions obtained for automotive design or any design is far from exact optimal solution so that increasing the need of use of optimization technique for safety and cost reduction. In this paper we are going to study case of chassis used in automotive component with one of method in topology optimization for safety of design. We are going to use optimality criteria for solution. Results obtained by this are totally based on given constraints to our structure design. Also, we study different method of topology optimization.
Shape optimization of a bracket model using Finite Element Analysis
2019
The objective of this research is to integrate a method of optimization of structures to the Computer-Aided Design (CAD) process with a mesh quadratic. Uses ANSYS software to perform static finite element analysis on a bracket model. On this basis, the homogenization method is adopted, and the total flexibility of the model is taken as the objective function, and the volume is used as the constraint condition. The topology optimization design of the model under several working conditions is carried out. The problems of basic model establishment, optimization region selection, optimization process control and optimization result analysis and application in topology optimization design process are discussed. The application of topology optimization in the initial design process of automotive structures is realized.
Topology Optimization of an Aircraft Bracket Without Shape Control
2020
Topology optimization is a simulation driven design technique used for creating an efficient material layout for a given design region, constraints and loading conditions. The goal is to maximize the system’s performance while minimizing the weight and meeting other functional requirements. The aim of this work is to optimize an existing aircraft bracket using Topology optimization technique. Topology optimization is performed in Altair Inspire software without using any shape control on the basis of five-volume retentions. Volume is specified as 20%, 30% 40%, 50% and 60% of the total design space volume. Post optimization analysis of all the five optimized geometries is carried out. Finally, one model based on optimum results is selected and the smoothing process is carried out using Polynurbs fit tool. The Final optimized model has a weight reduction of 46% and a significant stress reduction of 28%, 54.4%, 49.8% and 47.7% in vertical, horizontal, oblique and torsional load cases r...
High performance automotive chassis design: a topology optimization based approach
Structural and Multidisciplinary Optimization, 2011
Automotive chassis design in view of car weight reduction is a challenging task due to the many performance targets that must be satisfied, in particular in terms of vehicle safety. In this paper a methodology for automotive chassis design in involving optimization techniques is presented. In particular, topology, topometry and size optimizations are coupled with fem analyses and adopted in cascade for reaching an optimum chassis configuration. The methodology is applied to the design process of a rear-central engine high performance vehicle chassis. The objective of the optimization process is the chassis weight reduction, yet in fulfilment of structural performance constraints as required by Ferrari standards. The results demonstrate the general applicability of the methodology presented for obtaining the general trusses layout and thicknesses distribution of the structure. The numerical model at this stage shows a significant weight reduction when compared to the chassis of the Ferrari F458 Italia.
Topology optimisation of a bulkhead component used in aircrafts using an evolutionary algorithm
Procedia Engineering, 2011
The paper demonstrates the application of a modified Evolutionary Structural Optimisation (ESO) algorithm for optimal design of topology for an aerospace component. The capabilities of ESO for producing an optimal design against a specified strength constraint are illustrated using an aerospace design problem of optimisation of the topology of a bulkhead used in an aircraft structure. It has been shown that topology optimisation using ESO can result in considerable reduction in the weight of a structure and an optimum material utilisation by generating a uniformly stressed structure. The paper evaluates and establishes the ESO method as a practical tool for optimum topology design problems for complex industrial structures.
2018
The connecting rods are widely used in variety of internal combustion (IC) engine to transmit the thrust of the piston to the crankshaft and results into conversion of the reciprocating motion of piston to the rotational motion of crankshaft. The connecting rod has a complex geometry. Also, it faces a lot of tensile and compressive loads generated by mass and fuel combustion, during its life time. These loads results in axial and bending stresses. Bending stresses appear due to eccentricities, crankshaft, case wall deformation, and rotational mass force; therefore, a connecting rod must be capable of transmitting axial tension/compression and bending stresses caused by the thrust and pull on the piston and by the centrifugal force. The concept of structural optimization has been more and more widely accepted in many engineering fields. The structural optimization can result in a much more reasonable and economical structure design. Topology optimization is the technique that finds t...
A hybrid topology optimization algorithm for static and vibrating shell structures
International Journal for Numerical Methods in Engineering, 2002
Structural designers are reconsidering traditional design procedures using structural optimization techniques. Although shape and sizing optimization techniques have facilitated a great improvement in the emergence of new optimum designs, they are still limited by the fact that a suitable topology must be assumed initially. In this paper a hybrid algorithm entitled constrained adaptive topology optimization, or CATO is introduced. The algorithm, based on an artificial material model and an adaptive updating scheme, combines ideas from the mathematically rigorous homogenization (h) methods and the intuitive evolutionary (e) methods. The algorithm is applied to shell structures under static or free vibration situations. For the static situation, the objective is to produce the stiffest structure subject to given loading conditions, boundary conditions and material properties. For the free vibration situation, the objective is to maximize or minimize a chosen frequency. In both cases, a constraint on the structural volume/mass is applied and the optimization process is achieved by redistributing the material through the shell structure. The efficiency of the proposed algorithm is illustrated through several numerical examples of shells under either static or free vibration situations. Copyright © 2002 John Wiley & Sons, Ltd.