Structural optimization concept for the design of an aluminium control arm

2003 ◽  
Vol 217 (8) ◽  
pp. 647-656 ◽  
Author(s):  
Dong-Chan Lee ◽  
Jeong-Ick Lee
Keyword(s):  
Topology Optimization ◽  
Structural Optimization ◽  
Conceptual Design ◽  
High Performance ◽  
Optimization Design ◽  
Low Cost ◽  
Optimal Layout ◽  
Mass Reduction ◽  
Reinforcement Structure ◽  
Structural Rigidity

The development of a mechanical structure needs to be started from the conceptual design with low cost, high performance and quality. In this regard, the structural and topological shape of the system has a great e ect on the performance in terms of rigidity, strength and mass reduction. In this paper, optimization design methodologies in the design stages of an aluminium control arm for a suspension are presented. First, using topology optimization, the optimal layout and the reinforcement structure are obtained, and then the detail designs are carried out using shape optimization for the structural rigidity and strength. In comparison with a steel control arm, the mass reduction is 50 per cent and the structural rigidity and strength are improved up to 40 per cent.

Creating novel furniture through topology optimization and advanced manufacturing

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jiaming Ma ◽  
Zhi Li ◽  
Zi-Long Zhao ◽  
Yi Min Xie
Keyword(s):  
Topology Optimization ◽  
Computer Graphics ◽  
High Performance ◽  
Low Cost ◽  
Advanced Manufacturing ◽  
Furniture Design ◽  
Content Type ◽  
Initial Design ◽  
Manufacturing Technologies ◽  
Design And Production

Purpose Furniture plays a significant role in daily life. Advanced computational and manufacturing technologies provide new opportunities to create novel, high-performance and customized furniture. This paper aims to enhance furniture design and production by developing a new workflow in which computer graphics, topology optimization and advanced manufacturing are integrated to achieve innovative outcomes. Design/methodology/approach Workflow development is conducted by exploring state-of-the-art computational and manufacturing technologies to improve furniture design and production. Structural design and fabrication using the workflow are implemented. Findings An efficient transdisciplinary workflow is developed, in which computer graphics, topology optimization and advanced manufacturing are combined. The workflow consists of the initial design, the optimization of the initial design, the postprocessing of the optimized results and the manufacturing and surface treatment of the physical prototypes. Novel chairs and tables, including flat pack designs, are produced using this workflow. The design and fabrication processes are simple, efficient and low-cost. Both additive manufacturing and subtractive manufacturing are used. Practical implications The research outcomes are directly applicable to the creation of novel furniture, as well as many other structures and devices. Originality/value A new workflow is developed by taking advantage of the latest topology optimization methods and advanced manufacturing techniques for furniture design and fabrication. Several pieces of innovative furniture are designed and fabricated as examples of the presented workflow.

Research of a Novel Combined Metal-Fused Silica Resonator for Cylinder Shell Vibrating Gyroscopes

2012 ◽  
Vol 516 ◽  
pp. 443-446
Author(s):  
Yu Lie Wu ◽  
Qing Lei Luan ◽  
Hong Juan Cui ◽  
Xiao Mei Wu ◽  
Xiang Xi
Keyword(s):  
Structural Optimization ◽  
Resonance Frequency ◽  
Optimization Design ◽  
Low Cost ◽  
High Accuracy ◽  
Fused Silica ◽  
Cylinder Wall ◽  
The Novel ◽  
Q Factor ◽  
The Stability

A novel combined metal-fused silica resonator for the cylinder vibrating gyroscope is proposed in this paper. The cylinder wall of the resonator is made of fused silica, while the bottom is made of metal, and then the two parts are connected by strong glue. With this method, the manufacturing difficulty of the fused silica resonator can be reduced significantly and the performance can be retained without remarkable degeneration. In this paper, the novel metal-fused silica resonator is analyzed, including the structural optimization design and fabrication, testing of the stability of the resonance frequency and the Q factor. The preliminary experimental results show that the low-cost combined metal-fused silica resonator has potential good performance to achieve high accuracy in a cylinder shell vibrating gyroscope.

Optimal Layout of an Offshore Crane Using Topology Optimization

2012 ◽  
Author(s):  
In Gwun Jang ◽  
Byung Man Kwak
Keyword(s):  
Topology Optimization ◽  
Container Ship ◽  
Optimal Layout ◽  
Wind Force ◽  
Computational Framework ◽  
Structural Rigidity ◽  
Open Sea ◽  
Mass Minimization ◽  
Wave Induced ◽  
Offshore Crane

Mobile Harbor (MH) recently proposed by KAIST is a novel maritime cargo transfer system that can go out to a container ship anchored in the deep sea and handle containers directly at sea with the aid of the MH crane. Since this system operates under the open sea condition, the MH crane should be newly designed to support inertia load and wind force as well as its self-weight. Wave-induced motions of MH such as rolling, pitching, and heaving generates a significant amount of inertia load, which is ignored in the design of conventional cargo cranes installed on the stable ground. Wind force is also critical to consider a higher level of wind velocity in the open sea. In addition to structural rigidity, mass minimization is important in the design because it generally reduces overturning moment and therefore enhances ship stability. In this paper, we applied topology optimization to the stage of conceptual design for the MH crane, considering all the aforementioned features. We systematically obtained a design candidate through computational framework.

scholarly journals A Topology Optimization Method for Stochastic Lattice Structures

2021 ◽  
pp. 235-240
Author(s):  
Filippo Cucinotta ◽  
Marcello Raffaele ◽  
Fabio Salmeri
Keyword(s):  
Topology Optimization ◽  
3D Printing ◽  
Structural Optimization ◽  
High Performance ◽  
Three Dimensional ◽  
Optimization Method ◽  
Lattice Structures ◽  
Low Weight ◽  
Topology Optimization Method

AbstractStochastic lattice structures are very powerful solutions for filling three-dimensional spaces using a generative algorithm. They are suitable for 3D printing and are well appropriate to structural optimization and mass distribution, allowing for high-performance and low-weight structures. The paper shows a method, developed in the Rhino-Grasshopper environment, to distribute lattice structures until a goal is achieved, e.g. the reduction of the weight, the harmonization of the stresses or the limitation of the strain. As case study, a cantilever beam made of Titan alloy, by means of SLS technology has been optimized. The results of the work show the potentiality of the methodology, with a very performing structure and low computational efforts.

Research on Topology Optimization Design Based on Finite Unit Analysis of the Flywheel Hub

2014 ◽  
Vol 889-890 ◽  
pp. 467-473
Author(s):  
Pi Yan He ◽  
Jia Yang
Keyword(s):  
Finite Element Analysis ◽  
Topology Optimization ◽  
Structural Optimization ◽  
Optimization Design ◽  
Optimization Method ◽  
Normal Functioning ◽  
Optimization Analysis ◽  
Element Analysis ◽  
Evolutionary Structural Optimization ◽  
Security Configuration

Topology optimization design is to ensure the normal functioning of the machine, remove the invalid element structure makes the best structure to maintain the structure and keep the stress or strain level close to the same in each part of the security configuration, the pursuit of the best efficiency, lightest weight , smallest, or the longest service life and so on. Traditional structural optimization design one or several parameters set as the primary determination. This method only to the extent required. With the development and analysis of the efficiency of the computer, we have introduced in the design of finite element analysis. This article uses the basic evolutionary structural optimization method In this paper, load the hub topology optimization analysis of different groups.

Dynamic Topology Optimization for ATP Hanging Beam of EMU Bogie Based on Hyperworks

2011 ◽  
Vol 383-390 ◽  
pp. 5441-5446
Author(s):  
Chao Yan Wan ◽  
Xiao Feng Li ◽  
Jun Yong Li ◽  
Ying Liu
Keyword(s):  
Finite Element ◽  
Topology Optimization ◽  
Structural Optimization ◽  
Natural Frequency ◽  
High Speed ◽  
Optimization Design ◽  
Volume Fraction ◽  
Rapid Development ◽  
Optimization Techniques ◽  
Dynamic Topology

To achieve the damping design of an EMU bogie, the dynamic topology optimization is performed to the ATP hanging beam of bogie. Based on the HyperWorks / OptiStruct platform,the static and modal analyses on ATP are realized with the help of the finite element method. Then, the dynamic topology optimization is carried out in which improving the first natural frequency by variable density method is the optimization objective and the volume fraction and stress are the constraints. This optimization improves the structure and increases the natural frequency of the hanging beam. The design requirements are therefore satisfied. With the rapid development of high speed intercity rail, it's time to solve the security risk problem of trains. Using as the key components of high-speed bogie, more reasonable, safer and more reliable structure of ATP (Automatic Train Protection) hanging beam is needed by means of structural optimization, since it can improve the natural frequency of structure and increase the life of hanging beam on the hypothesis of meeting the fatigue strength conditions. Structural optimization design is a modern design manner combining the optimization techniques with the finite element analysis technology. In accordance with the degree of difficulty, it can be divided into size optimization, geometry optimization and structural topology optimization. The structural optimization design is the most challenging area because of the complexity of theory and calculation [1]. With the development and progress of technology, the dynamic characteristics of topology optimization for structures (including the natural frequency, mode shape, damping and stiffness and mass distribution, etc.) are attracted more and more attention[2]. The research focus mainly concentrates on the engineering applications [3-6]. In this paper, the dynamic topology optimization to the ATP hanging beam on a bogie is implemented by using the advanced structural optimization software named HyperWorks based on HyperWorks / OptiStruct platform [7]. An effective improvement plan of the ATP hanging beam is also introduced.

scholarly journals Topology Optimization Design and Experimental Research of a 3D-Printed Metal Aerospace Bracket Considering Fatigue Performance

2021 ◽  
Vol 11 (15) ◽  
pp. 6671
Author(s):  
Yisheng Chen ◽  
Qianglong Wang ◽  
Chong Wang ◽  
Peng Gong ◽  
Yincheng Shi ◽  
...  
Keyword(s):  
Topology Optimization ◽  
High Performance ◽  
Optimization Design ◽  
Fatigue Testing ◽  
Design Method ◽  
Vertical Direction ◽  
Structure Design ◽  
Fatigue Performance ◽  
Original Structure ◽  
Topology Optimization Problem

In the aerospace industry, spacecraft often serve in harsh operating environments, so the design of ultra-lightweight and high-performance structures is a major requirement in aerospace structure design. In this article, a lightweight aerospace bracket considering fatigue performance was designed by topology optimization and manufactured by 3D-printing. Considering the requirements of assembly with a fixture for fatigue testing and avoiding stress concentration, a reconstructed model was presented by CAD software before manufacturing. To improve the fatigue performance of the structure, this article proposes the design idea of abstracting the practiced working condition of the bracket subjected to cycle loads in the vertical direction via a multiple load-case topology optimization problem by minimizing compliance under a variety of asymmetric extreme loading conditions. Parameter sweeping was used to improve the computational efficiency. The mass of the new bracket was reduced by 37% compared to the original structure. Both numerical simulation and the fatigue test were implemented to support the validity of the new bracket. This work indicates that the integration of the proposed topology optimization design method and additive manufacturing can be a powerful tool for the design of lightweight structures considering fatigue performance.

Development of Small-Scale Multi-Effect Solar Still

Solar Energy ◽  
2003 ◽  
Author(s):  
Yuichi Yamaguchi ◽  
Haruki Sato
Keyword(s):  
Developing Countries ◽  
Water Resources ◽  
Conceptual Design ◽  
High Performance ◽  
Fossil Fuel ◽  
Low Cost ◽  
Small Scale ◽  
Solar Still ◽  
Solar Distillation ◽  
Multi Stage

The diffusion of solar distillation systems is necessary to solve a global problem on serious shortage of safe water resources in many developing countries such as Bangladesh. The solar still is required to be low cost, to have reliability for the safety and long durability, to be free from maintenance without any expendable supplies, having high performance, and it should be an environmentally friend device working without any fossil fuel. The economical balance to develop stills for residential purpose is considered. A 10 kg·day−1-scale solar still was developed and the characteristics are introduced. A conceptual design of a new 20–50 kg·day−1-scale multi-stage solar still is also introduced in this paper.

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