• Title, Summary, Keyword: CAE Analysis

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Design of Compressor Loop Pipe Using CAE (CAE에 의한 압축기 배관의 설계)

  • 박성근;조성욱;김형석;임금식
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.71-74
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    • 1993
  • The purpose of this paper is that the compressor design engineers reduce a development term with CAE approach. By using CAE, geometries for various type of piping systems can be constructed interactively and the Vibration Characteristics and Stress distribution are analyzed by FEM. Sensitivity and structural modification analysis capability are also used to reduce the total number of prototypes. An example is shown to validate the effectiveness of this system.

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Flexible Body Dynamics Analysis of Agricultural Tractor Using 4-Post Road Simulator (4-Post Road Simulator 를 이용한 농용 트랙터의 유연 다물체 동역학 해석)

  • Park, Ji Soo;Lee, Kang Wook;Cho, Chong Youn;Yoon, Ji Won;Shin, Jai Yoon
    • Transactions of the KSME C: Technology and Education
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    • v.3 no.2
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    • pp.83-88
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    • 2015
  • Agricultural tractors are utilized on rough road such as rice paddy field. Therefore, static and dynamic load should be considered when simulating structural analysis with finite element analysis (FEA). But it consumes a lot of time and effort to measure dynamic load because of difficulty and complexity in modeling various field working load conditions and kinematics of machinery. In this paper, to reduce the efforts, 4-post road simulator is developed for agricultural tractor like modeling commercial vehicle. In proving ground test in our facility, I measured acceleration of front/rare axle and strain of body frame to validate input loads. The acceleration is used for defining input loads. And strain is validated with dynamics analysis including mode superposition method. As a result, I was able to calculate 4-post input road profiles, which represent similar proving ground profile with good reliability.

Automatic Generation of CAD/CAE Model for a Stamping Die Rounding Optimization (스탬핑 금형의 라운딩 형상 최적화를 위한 CAD/CAE 모델 자동 생성)

  • Lee, Kang-Soo;Lee, Sang-Hun;Yin, Jeong-Je
    • Proceedings of the KSME Conference
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    • pp.269-274
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    • 2001
  • In order to reduce trial-and-errors in the die design and production, CAE systems for analysis of stamping tools have been introduced at the initial design stage recently. For optimal design, the CAE engineers may need to correct the meshes generated by automatic mesh generation programs. However, they may need help of CAD engineers as they are usually not skilled in manipulation of CAD systems. In order to get around these problems, automatic shell mesh modification method is proposed, which utilizes existing CAD/CAE package (in this study, I-DEAS) without user interaction. The developed method and optimization techniques are applied to a stamping die rounding optimization problem. The optimization results show that the manpower and the time required at virtual tryout can be reduced by using the developed systems.

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A Study on the Integration of CAD and CAE for Structural Optimal Design (구조최적설계를 위한 설계 및 해석 통합화 방안연구)

  • Park, Chang-Kyu
    • Journal of the Korean Society of Mechanical Technology
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    • v.19 no.3
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    • pp.333-339
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    • 2017
  • In product development, different divisions and businesses often have heterogeneous CAD/CAE systems and methods for expressing product data, and addressing this heterogeneity creates additional costs and causes longer development periods. To ensure successful collaboration in the design process, it is therefore imperative that different CAD, CAE, and other related systems be managed in an organic and integrated manner from the initial stages of product development. Therefore, this study suggests an integrated CAD/CAE system including optimal design in a more effective and integrated manner but also to support interfacing and the collective use of design and analysis tools. To validate the proposed method, a stiffened plate example is taken as an example. It is found that the proposed method could overcome the bottleneck of CAD and CAE such as transferability of data, though CATIA and ANSYS are used at the moment.

CAE Procedure of Engine Balance Shaft Housing for Prediction of Durability (엔진 밸런스 샤프트 하우징의 내구성 평가를 위한 CAE 절차 개발)

  • Choi, Hang-Jip
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.1
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    • pp.133-138
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    • 2007
  • The balance shaft housing in the recent engines tends to have the high cycle fatigue crack caused by increased engine power. In this paper, a CAE procedure is introduced to predict the durability of the balance shaft housing. The procedure is performed through two analysis steps. In the first step, the multibody dynamic simulation is used to obtain more accurate loading boundary conditions applied to the finite element model for the following step. Next, the finite element analysis is performed to predict the durability of the balance shaft housing through the calculation of the safety factor. Through this CAE procedure, the revised balance shaft housing was developed to improve the durability. And the durability of the housing was confirmed experimentally.

A study on the motorcycle lear cowl injection molding by CAE analysis (CAE 해석을 이용한 오토바이 리어카울 사출성형에 관한 연구)

  • Sung, Si-Myung;Jung, Sang-Jun
    • Journal of the Korea Society of Die & Mold Engineering
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    • v.13 no.4
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    • pp.34-39
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    • 2019
  • In this paper, in order to improve the formability and quality of the injection molded parts in the molds for molding the motorcycle rear cowl injection molded parts with different volumes at the same time, the flow of the molded parts is changed through the injection molding CAE analysis by changing the gate position, runner size and position. It is to find the optimum gate position, the diameter of the runner and the position where the balance is equal. The molded article formed by the optimization resulted in the uniformity of the molten resin at the same time at the corner of the product, thereby maintaining the flow balance favorable for mass production at lower injection pressure.

Evaluation and Optimization of Power Electronic Converters using Advanced Computer Aided Engineering Techniques

  • Oza, Ritesh;Emadi, Ali
    • Journal of Power Electronics
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    • v.3 no.2
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    • pp.69-80
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    • 2003
  • Computer aided engineering (CAE) is a systematic approach to develop a better product/application with maximum possible options and minimum transition time. This paper presents a comprehensive feasibility analysis of various CAE techniques for evaluation and optimization of power electronic converters and systems. Different CAE methods for analysis, design, and performance improvement are classified. In addition, their advantages compared to the conventional workbench experimental methods are explained in detail and through examples.

Design of BLDC Spindle Motor using CAE/CAT (CAE/CAT를 이용한 BLDC 스핀들 모터 설계)

  • 왕세명;기성현;정성천
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.154-159
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    • 1998
  • In this paper, BLDC spindle motor is designed using CAE/CAT to reduce structural vibration. Motor is modeled and analyzed using a finite element analysis (FEA) program and correlated to the results of modal test. Design sensitivity analysis (DSA) of frequency is carried out and validated by the modal test of modified motor manufactured. This study shows that simulation-based design can improve quality with reduced development time.

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Comparison of mean platelet volume levels in coronary artery ectasia and healthy people: systematic review and meta-analysis

  • Moghadam, Reza Heidary;Shahmohammadi, Afshar;Asgari, Nader;Azizi, Koorosh;Mansour, Sahar Mehr;Roozbahani, Mohammad
    • BLOOD RESEARCH
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    • v.53 no.4
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    • pp.269-275
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    • 2018
  • Coronary artery ectasia (CAE) is defined as the dilation of a segment of a coronary vessel to at least 1.5 times the diameter of its normal adjacent segment. Mean platelet volume (MPV) plays a role in acute coronary syndromes, with high MPV correlating to poor prognosis for acute thrombotic events and CAE. Several studies investigated the relationship between MPV and CAE, resulting in conflicting results. These results led us to systematically review all studies investigating the relationship between MPV and ectatic heart diseases by performing a meta-analysis study in order to report a unified result. This meta-analysis study investigated all case-control articles examining the relationship between MPV and CAE. All studies in the following databases published until January 31, 2018, were investigated: Science Direct, Scopus, PubMed, Google Scholar, and Web of Science. Following a quality control evaluation, 14 articles, all of which were published following studies performed in Turkey from 2007 to 2016, met the criteria for study inclusion. After pooling the results from all of the articles, a total standardized mean difference (SMD) value of 0.584 (95% CI, 0.219, 0.95) was obtained using the D+L pooled SMD, indicating a significant difference (P=0.002) between the two groups, with higher MPV values in ectatic patients when comparing to healthy individuals. Therefore, increased MPV levels were significantly related to CAE, suggesting that platelets, with their inflammatory and thrombotic activities, play a role in this disease. Therefore, anti-platelet and anti-inflammatory therapies may be effective in treating CAE.