The Optimization Design of a Heavy Truck Leaf Spring

2014 ◽  
Vol 644-650 ◽  
pp. 463-466
Author(s):  
Yao Ye ◽  
Feng Wang
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Optimal Solution ◽  
Leaf Spring ◽  
Traditional Design ◽  
Practical Engineering ◽  
Strength Material ◽  
Heavy Truck ◽  
Trial And Error Method ◽  
Error Method

The traditional design method of heavy truck leaf spring is always the trial-and-error method. In addressing the problem of being multi-objective, the weakness is that there is a large amount of calculation and it is difficult to find the most optimal solution. The leaf spring of the sinotruck ZZ4256N324MD1B is taken as the research object. With the constraint conditions of the spring's overall layout, stiffness, strength, material, size, and the requirements of the manufacturing process, the optimization design model is established. We follow the method of particle swarm optimization algorithm to get the more optimization design on the leaf spring. The calculation of design example shows that the method this article uses of optimization to solve practical engineering problems with complicated constraints is very effective.

CONTEXTUAL SUBTEXT INFORMATION OF A FOREIGN LANGUAGE TEXT: HERMENEUTIC APPROACH

2020 ◽  
Vol 2020 (30) ◽  
pp. 75-87
Author(s):  
Lidiya Derbenyova
Keyword(s):  
Foreign Language ◽  
Optimal Solution ◽  
Decision Making Process ◽  
Trial And Error ◽  
Transmission Of Information ◽  
Hermeneutic Approach ◽  
Trial And Error Method ◽  
Problems Of Translation ◽  
Error Method ◽  
Language Text

The article focuses on the problems of translation in the field of hermeneutics, understood as a methodology in the activity of an interpreter, the doctrine of the interpretation of texts, as a component of the transmission of information in a communicative aspect. The relevance of the study is caused by the special attention of modern linguistics to the under-researched issues of hermeneutics related to the problems of transmission of foreign language text semantics in translation. The process of translation in the aspect of hermeneutics is regarded as the optimum search and decision-making process, which corresponds to a specific set of functional criteria of translation, which can take many divergent forms. The translator carries out a number of specific translation activities: the choice of linguistic means and means of expression in the translation language, replacement and compensation of nonequivalent units. The search for the optimal solution itself is carried out using the “trial and error” method. The translator always acts as an interpreter. Within the boundaries of a individual utterance, it must be mentally reconstructed as conceptual situations, the mentally linguistic actions of the author, which are verbalized in this text.

A compliance modeling method of flexible rotary joint for collaborative robot using passive network synthesis theory

2021 ◽  
pp. 095440622110471
Author(s):  
Shoulin Xu ◽  
Bin He
Keyword(s):  
Design Method ◽  
Previous Method ◽  
Network Synthesis ◽  
Rotary Joint ◽  
Compliance Modeling ◽  
Passive Network ◽  
Modeling Theory ◽  
Trial And Error Method ◽  
Collaborative Robot ◽  
Error Method

Collaborative robots have become a research focus because of their wide applications. However, the previous compliance design method of the flexible rotary joint for collaborative robot mainly relied on experience of designers, and “trial and error” method is usually adopted, no feasible and systematic theory for the designer to select numerical value and series-parallel connection mode of the springs and dampers for the flexible rotary joint. Thus, developing a feasible compliance modeling theory to guide the design of the flexible rotary joint is a particularly challenging task. The main contribution of this paper is to present a novel and effective compliance modeling theory of the flexible rotary joint for collaborative robot based on electrical and mechanical passive network synthesis, to provide theoretical and systematic guidances for compliance design of the flexible rotary joint. First, inerter element is introduced into the mechanical system, and the compliance of the flexible rotary joint is expressed as an angular velocity admittance function using electrical and mechanical network analogy. Then, by passive network synthesis theory, the three kinds of compliance realization forms of rational function and four-element compliance realization conditions of biquadratic function for the flexible rotary joint are given using inerters, springs, and dampers. Moreover, numerical examples and simulations are conducted to illustrate effectiveness of the proposed compliance realization method. Finally, discussions are given to illustrate advantages of the proposed compliance modeling and design methods compared with the previous method.

Genetic algorithm-based optimization design method of the Formula SAE racing car’s rear wing

2017 ◽  
Vol 232 (7) ◽  
pp. 1255-1269 ◽  
Author(s):  
Hui Wang ◽  
Qiuyang Bai ◽  
Xufei Hao ◽  
Lin Hua ◽  
Zhenghua Meng
Keyword(s):  
Genetic Algorithm ◽  
Optimization Design ◽  
Design Method ◽  
Optimal Solution ◽  
Optimization Procedure ◽  
Formula Sae ◽  
Design Variables ◽  
Rear Wing ◽  
Sample Points ◽  
Lift And Drag

The aerodynamic devices play an important role on the performance of the Formula SAE racing car. The rear wing is the most significant and popular element, which offers primary down force and optimizes the wake. In traditional rear wing optimization, the optimization variables are first selected, and separately enumerated according to the analyzing experience of the racing car’s external flow field, and thus the optimal design is chosen by comparison. This method is complicated, and even might lose some key sample points. In this paper, the attack angle of the rear wing and the relative position parameters are set as design variables; then the design variables’ combination is determined by the DOE experimental design method. The aerodynamic lift and drag of the racing car for these variables’ combinations are obtained by the computational fluid dynamics method. With these sample points, the approximation model is produced by the response surface method. For the sake of gaining the best lift to drag ( FL/ FD) ratio, i.e. maximum down force and the minimum drag force, the optimal solution is found by the genetic algorithm. The result shows that the established optimization procedure can optimize the rear wing’s aerodynamic characteristic on the racing car effectively and have application values in the practical engineering.

Optimization Design Method of Sealing Concrete and Ballast

2011 ◽  
Vol 368-373 ◽  
pp. 390-394
Author(s):  
Mei Liang Yang ◽  
Zhen Hai Zeng ◽  
Fang Ping Zhong ◽  
Zhen Hua Li
Keyword(s):  
Objective Function ◽  
Optimization Design ◽  
Objective Function Value ◽  
Design Method ◽  
Optimal Solution ◽  
Xiangjiang River ◽  
Economical Efficiency ◽  
Independent Variables ◽  
Unfavorable Condition ◽  
Two Independent Variables

As defined in optimization ideas, economical efficiency is the objective function, while the volume of sealing concrete and ballast, two independent variables, exerts impacts on the objective function value through economic parameters respectively. Constraints are founded according to the strength and stability requirements of sealing concrete and steel box, in the most unfavorable condition. At the last, Matlab is used to achieve optimal solution. This paper combined Xiangjiang River Grand Bridge Project in Changxiang express way and achieved good practical results.

Study on Design Method for Scale and Layout of Road Passenger Station

2012 ◽  
Vol 238 ◽  
pp. 231-235
Author(s):  
Zhi Cheng Li ◽  
Quan Xin Sun ◽  
Shun Bo Zhao
Keyword(s):  
Design Problem ◽  
Optimization Design ◽  
Programming Model ◽  
Design Method ◽  
Layout Design ◽  
The Road ◽  
Traditional Design ◽  
Scale Design ◽  
Optimum Volume ◽  
Passenger Station

On basis of summarizing the traditional design methods on road passenger station, this paper discusses the influence of road passenger station layout on scale design. Combined with the analysis of layout design method for road passenger station, a bi-level programming model is proposed taking into account the overall optimization design problem of the scale and the location of the road passenger station. Through a numerical example analysis, an optimized station layout plan and an optimum volume allocation of the station are given out.

Design and Optimization of Injector Structure in Diesel Engine Based on ISIGHT Platform DOE Methods

2011 ◽  
Vol 335-336 ◽  
pp. 1376-1380
Author(s):  
Xin Ying Wu ◽  
Guang Yao Ouyang ◽  
Yu Xue Li
Keyword(s):  
Design Optimization ◽  
Multidisciplinary Design Optimization ◽  
Optimization Design ◽  
Design Method ◽  
Optimization Methods ◽  
Multidisciplinary Design ◽  
Design And Optimization ◽  
Traditional Design ◽  
Improved Performance

The traditional design method of injector structure cannot meet the demand of farther improved performance,the change of modern environment demand not only the optimization of one performance but also the optimization of various comprehensive performance.iSIGHT is a multidisciplinary design optimization platform that offer a integrated designenvironment and advanced design optimization methods. The optimization design of injector structure based on design of experiment of iSIGHT platform to improve the spray quality of injector is implemented.

Bi-direction evolutionary structural optimization in seismic design of braced steel frame tall buildings

2021 ◽  
Author(s):  
Cai Jinlun ◽  
Zhao Xin ◽  
Guo Junchen
Keyword(s):  
Structural Optimization ◽  
Seismic Design ◽  
Optimization Design ◽  
Design Method ◽  
Tall Buildings ◽  
Steel Frame ◽  
Large Space ◽  
Evolutionary Structural Optimization ◽  
Traditional Design ◽  
The One

<p>The traditional design method of high-rise building structure often has a lot of redundancy, on the one hand, it consumes a lot of engineering materials and energy, and there is a large space for optimization; on the other hand, due to the failure of rational and effective use of structural materials, it may lead to increased safety risks. In addition, the traditional design method is based on experience judgment and manual iteration, so the design workload is heavy and the design efficiency needs to be improved. In this paper, based on the bi-directional evolutionary structural optimization, the optimal seismic design of a braced steel frame tall building is carried out. The results show that the algorithm can reasonably distribute the materials to each member, and achieve an efficient seismic optimization design.</p>

Optimization Design of Cantilever Supporting Structure

2013 ◽  
Vol 357-360 ◽  
pp. 2410-2413
Author(s):  
Wei Xu ◽  
Jian Sheng Feng ◽  
Fei Fei Feng
Keyword(s):  
Genetic Algorithm ◽  
Optimization Design ◽  
Design Method ◽  
Optimal Solution ◽  
Optimization Method ◽  
Original Design ◽  
Supporting Structure ◽  
Primary Object ◽  
Design Variables ◽  
Optimum Solution

The primary object of this fundamental research is to reveal the application of genetic algorithm improved on the optimization design of cantilever supporting structure. In order to meet the strength of pile body and pile top displacement as well as design variables subjected to constraint, an algorithm is carried on to seek the optimum solution and relevant examples by means of comprehensively considering the effects on center-to-center spacing between piles,pile diameter and quantity of distributed steel, which is taken the lowest engineering cost as objective function. Through the comparison of the optimized scheme and original design, this fruitful work provides explanation to the effectiveness of genetic algorithm in optimization design. These findings of the research lead to the conclusion that the shortcomings of traditional design method is easy to fall into local optimal solution. The new optimization method can overcome this drawback.

APDL Based Vibration Optimization of a Ship Foundation

2011 ◽  
Vol 338 ◽  
pp. 525-529
Author(s):  
Fu Zhen Pang ◽  
Ye Qing Jin ◽  
Xiong Liang Yao
Keyword(s):  
Optimization Design ◽  
Vibration Isolation ◽  
Design Method ◽  
Optimization Theory ◽  
Foundation Design ◽  
Structural Dynamic ◽  
Optimization Study ◽  
Practical Engineering ◽  
Vibration Isolation Performance ◽  
Isolation Performance

Based on the structural dynamics optimization theory, a vibration optimization design method of a ship foundation by APDL language is presented in this paper. Structural dynamic optimization design of a ship foundation under the constraint of gross weight of a ship cabin is performed by ANSYS to minimize the vibration of ship hull plating. Optimization shows that the thickness of webs has considerable influence on the vibration isolation performance of ship foundation, while changes of the thickness of base panels and brackets have insignificant influence. Optimal thickness combination of webs, panels and brackets of the foundation is obtained through the optimization. Study also provides reference for practical engineering as well as enriches theories and methodologies of novel vibration isolation for ship foundation design.

The Multi-Objective Optimization Design of Leaf Spring of few Piece Variable Cross-Section

2011 ◽  
Vol 213 ◽  
pp. 231-235
Author(s):  
Qin Man Fan ◽  
Qin Man Fan
Keyword(s):  
Cross Section ◽  
Optimization Design ◽  
Optimal Solution ◽  
Variable Cross Section ◽  
Leaf Spring ◽  
Variable Cross ◽  
Multi Objective Optimization ◽  
Solution Quality ◽  
Front Suspension ◽  
Multi Objective

Being the ability of global optimization, MOPSO algorithm have some virtue such as high calculate velocity, good solution quality, great robustness, and so on. In allusion to a leaf spring of few piece variable cross-section, its multi-objective optimization mathematical model was built regarding minimum mass and minimum stiffness deviation as sub-objective functions. Taking the leaf spring of front suspension of a light truck as an example, the Pareto optimal solution set of optimization problem was obtained by using MOPSO algorithm. The optimization results show that the mass of the leaf spring reduced by 24.2% and the stiffness deviation is only 0.32% after optimization by using MOPSO algorithm.

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