scholarly journals Simulation and Optimization of Acoustic Package of Dash Panel Based on SEA

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Jintao Su ◽  
Ling Zheng ◽  
Jianping Lou
Keyword(s):  
Insertion Loss ◽  
Design Method ◽  
Front Wheel ◽  
Sound Insulation ◽  
Instrument Panel ◽  
Design Quality ◽  
Simulation And Optimization ◽  
Acoustic Design ◽  
Model Method ◽  
Proxy Model

The instrument panel assembly is an important structure to shield powertrain noise and front wheel noise, and the instrument panel sound insulation system plays a key role in it. Therefore, the sound insulation characteristics of the instrument panel sound insulation components appear particularly important. In the existing technology, the acoustic design of instrument panel mostly adopts the reverse design method and pays little attention to the forward design of acoustic system, which tends to lead to the shortcomings such as inaccurate acoustic design and poor acoustic design quality. The reverse design also restricts the development cycle, so the control and design of acoustic performance cannot be realized in the initial stage of design. Based on the above problems, the statistical energy model of the dashboard model was established by combining the statistical energy flow method and the proxy model method, and the influences of different acoustic cladding layers, different thickness, leakage, and new material microfibers on the sound insulation parameters of the front coaming were simulated. The general rules that affect the sound insulation performance of the structure are obtained. On this basis, multiobjective genetic algorithm and proxy model method are used to optimize the insertion loss of the front panel acoustic pack and the weight of the dashboard by introducing multiobjective variable and experimental design method, so as to obtain the best solution to meet the requirements of insertion loss and lightweight acoustic pack of the dashboard. It is of great engineering significance for the development of acoustic components for forward design instrument panel.

Sustainable Design Method for E- cigarette Products from the International Perspective

2021 ◽  
Vol 7 (5) ◽  
pp. 1329-1340
Author(s):  
Wang Huajie ◽  
Cheng Jianxin
Keyword(s):  
Product Design ◽  
New Product Development ◽  
Design Method ◽  
New Products ◽  
International Perspective ◽  
Design System ◽  
Brand Value ◽  
Design Evaluation ◽  
Design Quality ◽  
Cultural Experience

Objectives: Tobacco companies from various countries are facing pressure to participate in global competition. How to improve the products’ quality is important for the tobacco companies. In this study, based on the international perspective, the scale of E-cigarette product design evaluation is established, the brand value and cultural experience are integrated into the design activities, the design quality of the product is improved, and the culture is sustainable develop. Methods: This article constructs a product design system based on culture, experience and brand value perspectives by studying outstanding design brands product characteristics, using interviews and focus groups. This system includes design content in five aspects: value, aesthetics, function, innovation, and cultural experience. It further summarizes 20 design indicators. Using the analytic hierarchy process, the weight of the 20 design indicators is scored to determine the importance of guiding the design project. Results: In order to prove the effectiveness of the design index, combined with actual cases, in the process of designing a local brand of E-cigarette products in China, combined with relevant design indexes, compared with the index differences of international brands, focusing on 20 indexes The index with high weight value has studied the advanced aspects of international brand and completed the design of new products. The new proposal of the product was re-evaluated according to the design indicators. The new proposal has been significantly improved in all aspects. Conclusion: The actual results show that the established design indicators have certain guiding value for the development of new products. These indicators can be used as reference standards for design practice, and can also be used as standards for product design evaluation. They also have a certain value of new product development in other fields.

Narrow-band frequency selective fabrics: simulation and experiment results

2019 ◽  
Vol 89 (19-20) ◽  
pp. 4272-4281
Author(s):  
Fuwang Guan ◽  
Zhaole Li ◽  
Zhuli Yang ◽  
Chuyang Zhang ◽  
Yiping Qiu
Keyword(s):  
Narrow Band ◽  
Design Method ◽  
Simulation Software ◽  
Transmission Characteristics ◽  
Transmission Method ◽  
Band Frequency ◽  
Simulation And Optimization ◽  
Simulation And Experiment ◽  
Frequency Selective ◽  
High Consistency

In this paper, frequency selective fabrics (FSFs) with narrow-band transmission characteristics were proposed. The square-ring FSF was taken as an instance to illustrate the design principle. Based on the existing theoretical basis and by means of software simulation and optimization, the optimum structures with ideal narrow-band band-stop or band-pass characteristics were obtained. Then, the practical specimens were manufactured through a computer-based carving process and measured using the transmission method in an anechoic chamber. Two structural models were respectively simulated using two different algorithms and the results showed very small differences, primarily verifying the effectiveness of the design methods and reasonability of the model simplification. The measured and simulated transmission characteristics of square-ring FSFs were compared and showed a high consistency, which further verified the validation of the design method. The other two kinds of FSFs, namely Jerusalem-shaped and circle/ring hybrid FSFs, were designed and measured, which showed the narrow-band frequency selective characteristics were quite ideal. This indicates that the proposed design method using simulation software may be applied to many different structures and has directive sense in the related product design and development process.

scholarly journals A New Design Method for Ultrawideband Microstrip-to-Suspended Stripline Transitions

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Young-Gon Kim ◽  
Kang Wook Kim
Keyword(s):  
Conformal Mapping ◽  
Insertion Loss ◽  
Design Method ◽  
Impedance Matching ◽  
Characteristic Impedance ◽  
Ultra Wideband ◽  
Efficient Design ◽  
Em Simulation ◽  
Simulation Results ◽  
Analytical Expressions

A clear and efficient design method for ultra-wideband microstrip-to-suspended stripline transition, which is based on the analytical expressions of the whole transitional structure, is presented. The conformal mapping is applied to obtain the characteristic impedance of the transitional structure within 2.85% accuracy as compared with the EM-simulation results. The transition is designed to provide broadband impedance matching and smooth field conversion. The implemented transition performs less than 0.6 dB insertion loss per transition for frequencies up to 30 GHz.

Multi-Objective Optimal Design of a Double Circular Gear Based on the Differential Evolution Algorithm

2014 ◽  
Vol 977 ◽  
pp. 365-369
Author(s):  
Li Mei Zou ◽  
Bo Guo ◽  
Xue Yi Qian
Keyword(s):  
Differential Evolution ◽  
Optimization Design ◽  
Design Method ◽  
Optimization Technique ◽  
Differential Evolution Algorithm ◽  
Research Process ◽  
Multi Objective Optimization ◽  
Design Quality ◽  
Multi Objective ◽  
Technical And Economic Indicators

In order to improve the comprehensive technical and economic indicators of a double circular gear, based on the conjugate principle and design method of the double circular gear, by use of the modified differential evolution multi-objective optimization technique and MATLAB computer simulation technology, constrained multi-objective optimization design of a double circular gear was done. According to the research process and results, by use of the improved differential evolutionary multi-objective optimization technique, the design cycle of product can be shorten effectively, the design quality of product can be improved.

The High Precision Blade Electrochemical Machining Simulation and Cathode Optimization Based on Isogeometric Method

2013 ◽  
Vol 339 ◽  
pp. 489-494 ◽  
Author(s):  
Ying Xiang ◽  
Rong Mo ◽  
Neng Wan ◽  
Hu Qiao
Keyword(s):  
Geometric Modeling ◽  
Design Method ◽  
Electrochemical Machining ◽  
Machining Process ◽  
Machining Simulation ◽  
Analysis Model ◽  
Simulation And Optimization ◽  
Nurbs Basis Function ◽  
Important Means ◽  
Optimization Efficiency

The simulation and optimization of electrochemical machining is an important means to improve processing quality. However, the fragmented nature of geometric modeling and numerical analysis model, restricts the application proportion. Aiming at this problem, it is refined that the scientific problem of coordination modeling between CAD and CAE based isogeometric method. In this paper, the unified model is established based NURBS basis functions to solve the problems that the geometric parameterization and the infliction of boundary conditions. And the optimization efficiency is promoted by improved optimization model using the convex hull characteristic of NURBS basis function. At last, a confluent design method is realized for the blade electrochemical machining process.

The Simulation and Optimization Design of Adams-Based Engine Suspension System

2014 ◽  
Vol 686 ◽  
pp. 529-534
Author(s):  
Jian Xin Xie ◽  
Xiao Le Wang ◽  
Chao Liu
Keyword(s):  
Initial Data ◽  
Optimization Design ◽  
Vibration Isolation ◽  
Design Method ◽  
Suspension System ◽  
Multi Objective Optimization ◽  
Intrinsic Frequency ◽  
Simulation And Optimization ◽  
Engine Vibration ◽  
Simulation Results

In this study, the engine suspension system was optimized for making the vibration between engine and car body minimized, and also the optimization was simulated using software Adams. The purpose of this study was to research the vibration isolation of the engine mounting system and implement multi-objective optimization for the intrinsic frequency. In this paper, the optimization was implemented in two ways: (1) the intrinsic frequency was optimized by reasonably allocating it: (2) the intrinsic frequency was optimized using energy decoupling. The optimized intrinsic frequencies were simulated using software Adams and then the simulation results were compared. The simulation results showed that the optimized energy distribution was almost up to 90% and the decoupling degree was greatly improved by comparing the initial data, proving the optimized data played a greater effect on engine vibration isolation and further verifying the feasibility of optimization design method.

Investigation into the Properties of New Materials Having a Possible Effect on the Evaluation Parameters of Sound Insulation and Absorption

2015 ◽  
Vol 220-221 ◽  
pp. 55-59
Author(s):  
Danielius Gužas ◽  
Sergej Anashko ◽  
L. Gogolashvili
Keyword(s):  
Noise Reduction ◽  
Sound Insulation ◽  
New Materials ◽  
Design Quality ◽  
Physical Chemical ◽  
Long Time ◽  
Complex Construction ◽  
The Law ◽  
Evaluation Parameters

The efficiency of creating and designing noise reduction measures greatly depends on physical, chemical, mechanical and other properties of the selected materials. Some of them and sometimes all of those have a big impact on the general sound insulation of designed measures that also include absorption values predetermining their efficiency.As has been known for a long time, the formed heavy partitions and elements acquire increased sound insulation according to the law of mass, i.e. the heavier is the weight per m2 of the surface (kg/km2), the higher is the sound of insulation.To increase the efficiency of noise reduction in barriers, it is necessary to search for some other properties of the material like design, quality, etc.The article describes how calculations and empirical manipulations facilitate finding an optimal complex construction effectively reducing noise.

DYNAMIC ANALYSIS OF HEAD IMPACT TEST OF PASSENGER AIR-BAG MODULE ASSEMBLY OF VEHICLE USING FEM

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1699-1704 ◽  
Author(s):  
MOON SAENG KIM ◽  
JOON HO LEE ◽  
BYUNG YOUNG MOON
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Impact Analysis ◽  
Impact Test ◽  
Head Impact ◽  
Instrument Panel ◽  
Head Part ◽  
Fe Model ◽  
Design Quality ◽  
Air Bag

In this study, dynamic impact analysis for the passenger air-bag(PAB) module has been carried out by using FEM to predict the dynamic characteristics of vehicle ride safety against head impact. To carry out the dynamic analysis of head impact test of the PAB module assembly of automobile, the FE models, which are consist of instrument panel, PAB Module, and head part, are combined to the whole module system. Then, impact analysis is carried out by the explicit solution procedure with assembled FE model. And the dynamic characteristics of the head impact are observed to prove the effectiveness of the proposed method by comparing with the experimental results. As a result, the better optimized impact characteristics are proposed by changing the tie bracket's width and thickness of module. The proposed approach of impact analysis will provides an efficient vehicle to improve the design quality and reduce the design period and cost.

Fuzzy Synthesized Evaluation of Product Quality of Machine Tool Based on Harmonious Design Method

2009 ◽  
Vol 16-19 ◽  
pp. 1382-1386
Author(s):  
Chun Shi Liu ◽  
Xiao Peng Li ◽  
Wei Sun ◽  
Yi Min Zhang
Keyword(s):  
Machine Tool ◽  
Product Quality ◽  
Evaluation Method ◽  
Design Method ◽  
Price Ratio ◽  
Design Quality ◽  
Product Function ◽  
Working Capability ◽  
One Machine

In this work, it is presented and studied that the harmonious of product function with capability, harmonious of product with product, harmonious of product with people, with technology, with society environment, with entironment from the view of entironment, society, economy, science, politics, culture and legal point in the design process. And the quality verification and evaluation methods are studied to enhance the design quality more effectively. And that, all the studied contents is named harmonious design method. One machine tool is used as an example to explain the method with design quality evaluated by fuzzy synthesized evaluation method from function, structure capability, working capability and craftwork capability factors. The grade and disparity of design quality are obtained through the evaluation results, then design project could be modified based on it, and it is very useful to improve product quality and to enhance performance-price ratio and market competitive ability.

Acoustic Design of Lightweight Gas Turbine Enclosures

1991 ◽  
Vol 113 (4) ◽  
pp. 544-549 ◽  
Author(s):  
R. D. Rawlinson
Keyword(s):  
Gas Turbine ◽  
Structural Strength ◽  
Cost Effective ◽  
Sound Insulation ◽  
Flat Panel ◽  
Safety Requirements ◽  
Acoustic Design ◽  
Design Requirements ◽  
Acoustic Enclosures ◽  
Careful Design

Acoustic enclosures for the gas turbine industry have to comply with a number of stringent safety requirements including structural strength, fire resistance, and sound insulation. This has led traditionally to heavy enclosure designs. Corrugated enclosure panels offer significant structural advantages because of their increased bending stiffness. Consequently, a corrugated panel of a given thickness can give the same structural strength as a flat panel of substantially greater weight and thickness. However, corrugated panels are intrinsically less effective as a sound insulator than flat panels of the same thickness. This paper examines the implications of corrugated, lightweight panels for acoustic enclosures. It illustrated that, by careful design, the inherent acoustical disadvantages of corrugated panels can be overcome so that thinner, lighter, and more cost-effective enclosures can be used without compromising the overall structural and acoustical design requirements.

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