Optimal Design of Semi-Trailer Frame Based on Topology Optimization

2012 ◽  
Vol 197 ◽  
pp. 502-507
Author(s):  
Li Li Dai ◽  
Jing Gang Wang ◽  
Shuang Zhao ◽  
Ya Qiong Deng ◽  
Nan Jia
Keyword(s):  
Topology Optimization ◽  
Optimal Design ◽  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Frame Structure ◽  
Topological Optimization ◽  
Static Characteristics ◽  
Manufacturing Efficiency ◽  
Original Frame ◽  
The Cost

40t semi-trailer frame is optimized by usage of topological optimization and static/dynamic analysis technology. After the optimization, The static characteristics of frame completely satisfy requirement of intensity and stiffness, and the quality is reduced by 10% compared with the original frame. The dynamic characteristics of the new frame have been improved greatly, which indicate that the optimized frame structure is more reasonable, and lay the foundation for reducing the cost and improving manufacturing efficiency.

Laminated-Object-Manufacturing*/Laminated object manufacturing - A method for the production of topological optimization parts

2016 ◽  
Vol 106 (05) ◽  
pp. 354-359
Author(s):  
M. Mottahedi ◽  
P. Zahn ◽  
A. Lechler ◽  
A, Prof. Verl
Keyword(s):  
Topology Optimization ◽  
Additive Manufacturing ◽  
Topological Optimization ◽  
Optimal Topology ◽  
Manufacturing Method ◽  
Laminated Object Manufacturing ◽  
Maximum Stiffness ◽  
Global Topology ◽  
The Cost

Topologisch optimierte Bauteile gestatten maximale Steifigkeit bei minimalem Materialeinsatz. Für die Erzeugung solcher Topologien werden meist Algorithmen eingesetzt, die Fertigungseinschränkungen auf Kosten von optimalen Ergebnissen berücksichtigen und keine variablen Materialdichten zulassen. Dieser Fachartikel stellt ein additives Herstellungsverfahren zur Fertigung global optimaler Topologien vor. Als Ergebnis können mittels der ausgewählten Algorithmen Bauteile mit höherer Steifigkeit hergestellt werden.   The optimal topology of components leads to maximum stiffness with minimum material use. To generate these topologies, normally algorithms are employed that tackle manufacturing limitations at the cost of the optimum. This article introduces an additive manufacturing method to enable the production of global topology optimization results. The findings show that by implementing the selected algorithm the stiffness of the components are higher than what could have been produced by conventional techniques.

Optimal Design of the Compression Coil Spring in the Tool-in-Use System of the Jade Carving Machine Based on Dynamic Analysis

2009 ◽  
Vol 69-70 ◽  
pp. 621-625
Author(s):  
Huai Rong Shi ◽  
R.Y. Rui ◽  
Yi Fang Wen
Keyword(s):  
Optimal Design ◽  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Scaling Functions ◽  
Coil Spring ◽  
Constraint Condition ◽  
Static State ◽  
Function Design ◽  
Machine Structure

While to consider the function of compression coil spring in a static state, the most important is the needs of dynamic characteristics. We infer a design mode with link up the static state and development, and bring both to the constraint condition of optimal design. It is basis of the development function of compression coil spring is the property of vibrate displacement. And we adopt the optimal design of MathCAD in the computer, simplified the handle of several scaling functions. The effect proves that in the living example of compression coil spring from tool-in-use system, it makes that simple and valid. Thus provide a basis for the function design of machine structure.

The Optimization Design and Analysis of Motorcycle Frame Structure

2011 ◽  
Vol 141 ◽  
pp. 569-573 ◽  
Author(s):  
Jiang Wang ◽  
Ji Zhou ◽  
Bao Bao Li ◽  
Xiao Ling Li ◽  
Shi Yong Song
Keyword(s):  
Topology Optimization ◽  
Engineering Design ◽  
Optimization Design ◽  
Optimization Theory ◽  
Frame Structure ◽  
Fem Model ◽  
Fatigue Stress ◽  
And Topology ◽  
Motorcycle Frame ◽  
The Cost

The optimization theory of the motorcycle frame structure was described. The FEM model of the frame structure was established by Hyperworks software, the stress and fatigue stress of the frame structure was analyzed. The frame parts were optimized through the size and topology optimization according to the stress and the displacement. The result showed that the stress of the frame structure changed little comparing with that before, which was in the permitted range of engineering design. The cost of the motorcycle frame structure was reduced, and the frame weight was lightened about 6.5%.

Topology and Sizing Optimization of Light-Weight Frame for Energy-Saving Vehicle

2011 ◽  
Vol 308-310 ◽  
pp. 1220-1225
Author(s):  
Qiang Liu ◽  
Xiao Kang Ma ◽  
Yong Zhou Lin ◽  
Zhi Jian Zong
Keyword(s):  
Topology Optimization ◽  
Energy Saving ◽  
Optimization Method ◽  
Local Deformation ◽  
Frame Structure ◽  
Light Weight ◽  
Sizing Optimization ◽  
Weight Design ◽  
Original Frame ◽  
Two Stages

In order to minimize the fuel consumption, the topology optimization and sizing optimization are applied in the light-weight design of frame for energy-saving vehicle. The investigation consists of two stages. In the first stage, the static analysis and topology optimization were carried on the original frame to obtain the optimal layout. Then the sizing optimization was explored to find the feasible section dimension of beam. The simulation results revealed that the stress concentration and excessive local deformation of vehicle frame structure have been remarkably improved, meanwhile, the frame’s weight has been decreased more than 15.0%. It is concluded that the optimization method is effective to obtain the optimal light-weight design for vehicle frame.

scholarly journals Topological Optimization of Aircraft Frame Structures with the Variable Density Method

2018 ◽  
Vol 198 ◽  
pp. 05008
Author(s):  
ying-lei Li ◽  
zong-jie Cao ◽  
Zi-li Wang
Keyword(s):  
Topology Optimization ◽  
Lagrange Function ◽  
Optimization Method ◽  
Variable Density ◽  
Frame Structure ◽  
Topological Optimization ◽  
Frame Structures ◽  
Distribution Law ◽  
Structural Distribution ◽  
Density Method

In this paper, a variable density topological optimization method is derived on the basis of Lagrange function, and the RAMP interpolation model is selected to optimize the frame structure of aircrafts with variable density method. For an example, the ordinary frame structure of the domestic planes is taken to illustrate validity of the presented method. The numerical model of the aircraft frames is obtained. The optimal design analysis of the model structural distribution and the weight loss requirement of the aircraft frame structures are realized. In conclusion, the structural distribution law of the topology optimization is summarized according to the topology optimization structures.

scholarly journals Implementation of Structural Assemblies by Simultaneous Projection and Density-Based Topology Optimization

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Nouman Saeed ◽  
Kai Long ◽  
Jamshed Ahmed Ansari ◽  
Nasif Raza Jaffri ◽  
Usama Abrar
Keyword(s):  
Topology Optimization ◽  
Optimal Design ◽  
Computational Cost ◽  
Topological Optimization ◽  
Numerical Examples ◽  
Final Structure ◽  
Critical Design ◽  
Geometric Entity ◽  
Minimum Number ◽  
Number Of Iterations

This article proposed a methodology that combines two well-known projections and modified density-based optimized techniques in one formulation methodology. This methodology contains an effective explicit geometric entity identified by shape variables that provide easy control in desired particular regions; implicit density-based topological optimization entities utilized topological variables that offer critical design elsewhere. Our main attractive key point of this combined formulation approach is structural assemblies. Structure always manufactures in many patches and joins them by utilizing the structural assemblies such as welding and riveting. It is not easy to execute the structural patches at the required region without acknowledging their dimensions. This proposed approach demonstrates the competence to impose the restrictions related to shape and topological variables of interfaces among the specific patches. Numerous standard numerical examples make sure the validation of the introduced methodology. It remarked that the optimal design could minimize compliance and the minimum number of iterations through numerically performed, concerning computational cost minimized without any kind loss of accuracy of the final structure.

scholarly journals Smoke recognition network based on dynamic characteristics

2020 ◽  
Vol 17 (3) ◽  
pp. 172988142092566
Author(s):  
Dahan Wang ◽  
Sheng Luo ◽  
Li Zhao ◽  
Xiaoming Pan ◽  
Muchou Wang ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
State Of The Art ◽  
The State ◽  
Detection Accuracy ◽  
Static Characteristics ◽  
Good Tool ◽  
Early Signal ◽  
Fuzzy Objects ◽  
The Difference ◽  
Smoke Recognition

Fire is a fierce disaster, and smoke is the early signal of fire. Since such features as chrominance, texture, and shape of smoke are very special, a lot of methods based on these features have been developed. But these static characteristics vary widely, so there are some exceptions leading to low detection accuracy. On the other side, the motion of smoke is much more discriminating than the aforementioned features, so a time-domain neural network is proposed to extract its dynamic characteristics. This smoke recognition network has these advantages:(1) extract the spatiotemporal with the 3D filters which work on dynamic and static characteristics synchronously; (2) high accuracy, 87.31% samples being classified rightly, which is the state of the art even in a chaotic environments, and the fuzzy objects for other methods, such as haze, fog, and climbing cars, are distinguished distinctly; (3) high sensitiveness, smoke being detected averagely at the 23rd frame, which is also the state of the art, which is meaningful to alarm early fire as soon as possible; and (4) it is not been based on any hypothesis, which guarantee the method compatible. Finally, a new metric, the difference between the first frame in which smoke is detected and the first frame in which smoke happens, is proposed to compare the algorithms sensitivity in videos. The experiments confirm that the dynamic characteristics are more discriminating than the aforementioned static characteristics, and smoke recognition network is a good tool to extract compound feature.

scholarly journals Dynamic Modeling and Characteristic Analysis of Cantilever Piezoelectric Bimorph

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Heng Chen ◽  
Jun-shan Wang ◽  
Chao Chen ◽  
Shi-xiang Liu ◽  
Hai-peng Chen
Keyword(s):  
Axial Force ◽  
Dynamic Characteristics ◽  
Dynamic Equations ◽  
Steady State Response ◽  
Static Characteristics ◽  
Piezoelectric Bimorph ◽  
Characteristic Analysis ◽  
Generalized Coordinates ◽  
State Response ◽  
Millisecond Range

The analytical model of an axially precompressed cantilever bimorph is established using the Hamilton’s principle in this study, and the static characteristics are obtained. The dynamic equations of the cantilever bimorph in generalized coordinates are established using a numerical method, and the dynamic characteristics are analyzed. Finally, simulations are performed and experiments are conducted to verify the validity of the theory. The results show that increase of axial force has significant amplification effects on the steady-state response amplitude of the displacement, and it reduces the resonance frequency. The response time is still in the millisecond range under a large axial force, which indicates that the bimorph has excellent dynamic characteristics as an actuator.

Numerical Experiments in Using Voronoi Cell Finite Elements for Topology Optimization

2009 ◽  
Author(s):  
James M. Gibert ◽  
Georges M. Fadel
Keyword(s):  
Topology Optimization ◽  
Isotropic Material ◽  
Numerical Experiments ◽  
Voronoi Cell ◽  
Material Model ◽  
Topological Optimization ◽  
Advantages And Disadvantages ◽  
Compliance Minimization ◽  
Design Variables ◽  
Standard Linear

This paper provides two separate methodologies for implementing the Voronoi Cell Finite Element Method (VCFEM) in topological optimization. Both exploit two characteristics of VCFEM. The first approach utilizes the property that a hole or inclusion can be placed in the element: the design variables for the topology optimization are sizes of the hole. In the second approach, we note that VCFEM may mesh the design domain as n sided polygons. We restrict our attention to hexagonal meshes of the domain while applying Solid Isotropic Material Penalization (SIMP) material model. Researchers have shown that hexagonal meshes are not subject to the checker boarding problem commonly associated with standard linear quad and triangle elements. We present several examples to illustrate the efficacy of the methods in compliance minimization as well as discuss the advantages and disadvantages of each method.

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