• Journal of Advanced Marine Engineering and Technology
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• 제34권4호
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• pp.554-559
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• 2010

구명정 진수장치는 크게 main frame, main arm, upper arm, support bar로 구성되어 있다. 본 논문에서는 upper arm의 굽힘 강성에 영향을 주는 인자로 plate 두께와 arm 단면의 가로 세로 길이를 설계 인자로 설정하며, 이들 인자에 대한 영향력을 분석하고자 하였다. 설계 인자에 대한 영향력 분석을 위해 실험계획법의 일종인 다구찌법과 함께 수치해석적인 방법을 이용하였으며, 각 설계인자간의 영향력 분석을 통해 실질적으로 산업에 도움을 주고자하였다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.385-388
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• 2005

Finite element method and Taguchi method were used to reduce the floor impact vibration of the reinforced concrete slab in the apartment buildings. At first, experimental results show that sound peak components to influence the rating of floor impact sound insulation were coincident with natural frequencies of the reinforced concrete slab, and there is a high linear relation between floor impact vibration and sound. The tables of orthogonal arrays were used for finite element analysis with 5 factors related to slab shape parameters and its results were analyzed by statistical method. The most effective factor to reduce the floor impact vibration was the length of living/kitchen room and the floor impact vibration was predicted by 30% reduction in the acceleration peak by the optimal design values of the factors.

• 소음진동
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• 제11권2호
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• pp.234-240
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• 2001

Recently, the regulations from the government and the concerns of people be raised to the interest in exhaust and intake noise of passenger car as much as other vehicles. In these demands, performance prediction software was developed in this paper. In this study, Robust design was used for improving the noise reduction capacity of intake system with the performance prediction software. On the basis of the existing design, length and radius of each component that was thought to be effective to the performance of intake system was selected. At first, factors are arranged by using Ll8 table of orthogonal array and then optimum value can be obtained by modified Ll6 table of orthogonal array.

• 한국가스학회지
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• 제10권2호
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• pp.40-46
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• 2006

본 논문은 다구찌 실험 설계법을 이용하여 O-링을 장착하는데 필요한 사각 그루브의 최적설계를 위해 FEM으로 최대코시응력과 최대변형률에 대하여 해석하였다. 다구찌 설계방법은 LPG 충전노즐의 내경측에 밀봉을 위해 설치하는 O-링 그루브의 설계변수를 최적화 하는데 대단히 유용하다. FEM과 함께 다구찌 설계기법을 적용하여 계산된 해석결과에 따르면, 최적화 설계치수를 단지 9번의 반복 실험법에 의해 설계변수의 치수를 최적의 조건으로 얻을 수 있다는 측면에서 간편한 최적설계 기술이다. 이것은 다구찌 설계 실험법이 사각형상의 O-링 그루브를 설계하는 간단한 방법으로 대단히 유용하다는 것이다. 다구찌 설계기법에 기초한 해석결과에 의하면, O-링 그루브의 기하학적 형상에 대한 최적치수는 h=2.5mm, d=2.74 mm, c=0.15 mm, w=3.0 mm으로 각각 요약될 수 있다. 본 연구는 공급된 LPG 가스압력이 18 $kg/cm^2$인 상태에서 밀봉성과 안전성을 고려하면 초기압축률은 8.7%로 유지하는 것이 가장 효과적이라는 사실을 제공한다.

• 한국가스학회지
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• 제8권4호
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• pp.30-35
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• 2004

본 논문은 다구찌 실험 설계법을 이용하여 압력용기의 메탈시일 구조물에 대한 해석을 수행하였다. 다구찌 설계방법은 압력용기의 밀봉을 위한 캔티레버 타입 밀봉장치 구조물에 대한 설계 파라메터를 최적화 하는데 대단히 유용하다. 다구찌 기법으로 수행된 해석결과에 따르면, 최적화 설계 치수는 단지 16번의 반복 실험법에 의해 파라메터 치수를 최적의 조건으로 얻을 수 있다는 측면에서 간편한 설계도구이다. 이것은 다구찌 설계 실험법이 곡선면을 갖는 구조물의 최적화 설계에서 대단히 유용하다는 것을 의미한다. 다구찌 설계기법에 기초한 해석결과를 보면, 메탈시일 구조물의 에지부에 대한 최적화 치수와 경사각도는 $d_1=50mm,\;d_2=60mm,\;a_1=20^{\circ},\;a_2=8^{\circ},\;a_3=5^{\circ}$으로 각각 요약될 수 있다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2005년도 창립60주년 기념 추계 학술대회
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• pp.64.2-64.2
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• 2005

• 한국자동차공학회논문집
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• 제12권2호
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• pp.131-138
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• 2004

In the proto design stage of a new car, the performances of an occupant protection system can be evaluated by CAE even though the real test should be carried out. The number of the real test is reduced by the exact predictions followed by the appropriate design recommendation. However, the existing researches using CAE in predicting the performances do not consider the uncertainties of parameters. That often leads to inconsistency between test and CAE. In this research, the robust design of a protection system such as airbag and load limiter is suggested considering the frontal crash. The parameter design scheme of the Taguchi method is introduced to obtain the robust design of arbitrary airbag and load limiter. It is performed based on the frontal crash test condition of US-NCAP with an arbitrary passenger car. The variances of the performances such as HIC, chest acceleration and probability of combined injury are calculated by the outer array and the Taylor series expansion. Through the analysis of the Taguchi method, the robust optimum is determined.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 추계학술대회
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• pp.534-538
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• 2004

On this study, we improved diaphgram for micro speaker performance using Taguchi method in discrete design space. The design of diaphgram has an effect on performance of micro speaker such as, thickness of diaphgram, shape of diaphgram, etc. Therefore this study carried to decide shape of diaphgram and thickness of diaphgram for minimizing 2nd natural frequency of diaphgram using Taguchi method. we showed improved design factors that minimized 2nd natural frequency of diaphgram. Also, 2nd natural frequency of diaphgram for micro speaker is reduced up to 37 percent maintaining twist mode shape. From the results of ANOVA, 2nd natural frequency of diaphgram for micro speaker have an effect on position of the outer curved shape and thickness of diaphgram.

• 한국기계가공학회지
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• 제19권2호
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• pp.55-62
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• 2020

In this study, a PDMS-based low-elasticity magnetorheological elastomer (MRE) was fabricated and the Taguchi method was used to identify the factors affecting the elastic modulus. The mixing entropy was calculated using optical microscopy to confirm particle dispersion, which was referenced in the process establishment. In the MRE process, four parameters, namely the curing agent, particle type, particle fraction, and applied magnetic field, were divided into three levels. The elastic modulus of the specimen was compared at the off-state and at 0.2 T using compression tests, and the obtained signal to noise ratio indicated that the softness and change in the elastic modulus of the MRE was mainly affected by the curing agent and the particle fraction.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2003년도 봄 학술발표회 논문집
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• pp.299-304
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• 2003

The design of an occupant protection equipment has been considered as the important process in developing a new car since the crash performance plays an important role on the market. The cost is increased when an unexpected real test is carried out in the proto-design stage. Thus, the exact prediction of a crash performance can reduce the number of full-car test. In this research, the robust design of an airbag system considering the frontal crash is suggested to predict the more reliable responses. On the contrary, most existing researches do not consider the uncertainties. The uncertainties treated in this research are the tolerances of the vent hole, the time to fire and the length of a strap in airbag and the tolerance of the load limiter load in seat belt. The Taguchi method is utilized to determine the robust optimum of each parameter