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성기득(Kideug Sung),양원호(Wonho Yang),조명래(Myoungrae Cho),김철(Cheol Kim) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.5
In this paper, we investigate contact characteristic of wheel-rail interface for rolling stock using the finite element method. Contact stress distribution due to the rail mounting slope is obtained in order to reduce the contact stress. Stress analysis of the rail, firstly, is performed one subjected to elliptical pressure based on Hertz theory. Secondly, we perform stress analysis of the rail subjected to contact stress obtained by this study. Results for the maximum shear stress, its location and the principal shear stress distribution are compared.
철도차량용 휠 플레이트의 응력해석 및 형상설계에 관한 연구(2)
성기득(Kideug Sung),양원호(Wonho Yang),조명래(Myoungrae Cho),정기현(Kihyun Chung) 한국자동차공학회 2001 한국 자동차공학회논문집 Vol.9 No.3
The mechanical stress due to the wheel-rail contact and thermal stress due to the drag braking increase the incidence of wheel failure. So, firstly, stress analyses(mechanical, thermal and combined stress) of wheel plate are performed using 3-dimensional finite element method(FEM). Secondly, the optimum design of wheel plate is investigated in order to reduce weight of the wheel based on results of stress analysis. The optimum design is peformed using 2-dimensional axisymmetric F.E. model and its results are verified by 3-dimensional F. E. model.<br/>
정상 상태 롤링 해석 기법 적용을 통한 타이어 패턴 형상에 따른 PRAT 특성 연구
성기득(Kideug Sung),박현만(Hyunman Park),구병국(Byongkook Koo),조춘택(Choontack Cho) 한국자동차공학회 2008 한국 자동차공학회논문집 Vol.16 No.5
It is generally known that the PRAT(Plysteer Residual Aligning Torque) is one of indicating a performance factors of a tire for assessing the vehicle pull, also tire pattern shape, which means lateral groove angle, is very important tire design factor in relation to the PRAT. Lateral grooves of tire pattern are widely divided into center and shoulder parts. So, this paper has studied the correlation between the PRAT and their lateral groove angles using FEM. Especially, the steady state rolling analysis among tire rolling analysis methods has been used for the. PRAT performance study. Firstly, analysis result data have been compared with the experimental data to validate FE analysis for PRAT. Next, the PRAT due to the lateral groove angle about PCR(Passenger Car Radial) tire and SUV tire has been analyzed. The tendency of the PRAT due to the lateral groove angles can be used as a guide line for the tire design in relation to vehicle pull.
유한요소법을 이용한 타이어 패턴 형상에 따른 PRAT 특성 연구
성기득(Kideug Sung),김성래(Sungrae Kim),육남석(Nam Suk Youk),김남균(Nam Kyun Kim),손창억(Chang Euk Son),조춘택(Choontack Cho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is generally known that the PRAT(Plysteer Residual Aligning Torque) is one of indicating a performance factors of a tire for assessing the vehicle pull. And the PRAT of a tire depends on various tire design factors. Expecially tire pattern shape, which means lateral groove angle, is very important tire design factor in relation to the PRAT. Lateral grooves of tire pattern are widely divided into center and shoulder parts. So, this paper has studied the correlation between the PRAT and their lateral groove angles using FEM. Firstly, analysis result data have been compared with the experimental data to validate FE analysis for PRAT. Next, the PRAT due to the lateral groove angle about PCR tire and SUV tire has been analyzed. The tendency of the PRAT due to the lateral groove angles can be used as a guide line for the tire design in relation to vehicle pull.
타이어 설계인자와 PRAT 및 코너링 강성과의 상관성 연구
성기득(Kideug Sung),김성래(Sungrae Kim),손일수(Ilsu Son),구병국(Byongkook Koo),김선주(Sonjoo Kim),조춘택(Choontack Cho) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
It is generally known that the PRAT(Plysteer Residual Aligning Torque) is one of indicating a performance factors of a tire for assessing the vehicle pull. It is also known that cornering stiffness has relation to the steering response in handling test. This paper has studied about the correlation between PRAT, cornering stiffness and tire design factors using FEM. Analysis variables(design factors) for this study are belt angle, EPI, cord diameter and carcass turn up height. We also have studied the correlation between PRAT and the different lateral groove types. This paper introduces the modeling method using ABAQUS CAE for PRAT analysis including 3-D patterned modeling.<br/> Finally, the correlation between the vehicle pull and PRAT has been investigated about the 3 types of the pattern using ADAMS S/W.
3D 패턴드 타이어에 대한 정상 상태 롤링 해석 기법 적용
성기득(Kideug Sung),김성래(Sungrae Kim),박현만(Hyunman Park),김남균(Namkyun Kim),손창억(Changeuk Son),조춘택(Choontack Cho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The steady state rolling analysis method in relation to tire analysis has been often used for the research of tire rolling performance because of the efficiency of computation time. But, this has a limit that meshes in the section have to be the same along the circumferential direction, so can not consider 3D pattern. That is, as above reason, this has been used for performance research in relation to only tire structure factors without 3D pattern until now. However, from now, it is possible to analyze in consideration of 3D pattern due to F.E. code development recently. So, in this study, we have examined the application of rolling performance research of 3D patterned tire using steady state rolling analysis implementing ABAQUS Release 6.6. We have analyzed the PRAT in relation to vehicle pull, cornering stiffness in relation to steering response, the footprint shape and F&M in the cornering state, and compared with test results.
블록 강성의 예측 방법과 타이어 패턴 설계 적용에 관한 연구
김성래(Seongrae Kim),성기득(Kideug Sung),구병국(Byoungkook Koo),조춘택(Choontack Cho) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Pattern shape on the tire is one of the most interested area for the tire designer, because it is important component which is related with a lot of performances and also should arouse customer's interest. Especially, the behaviour of tread pattern block is one of basic reference that estimates wear performance, breaking performance, and cornering performance, etc. To estimate this behaviour of pattern block, block stiffness values have often used in the pattern shape design step. In this study, numerical and analytical approach are introduced and compared to estimate block stiffness of pattern, and we study on the method to apply block stiffness to pattern shape design. And by applying this method to simple pattern block, we investigate the relation between block stiffness and tire stiffness by tread pattern.
Tire Block 강성에 따른 Snow 성능 변화 연구
조훈(Hun JO),성기득(KiDeug Sung),추권철(KwonChul Choo) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
본 논문은 compound 인자에 의한 Tire Block 강성의 변화에 따라 Snow 성능이 어떻게 변화하게 되는지에 관한 내용이다. 동일 Pattern, 이종 Compound로 Version을 구성하였고 4가지 Case로 검증 하였다. 일정 및 평가 장소 2020년 4월 핀란드 Snow 평가 장에서 진행하였다. Case 1 : 자사 Snow Pattern중의 하나인 Winguard Sport 2 _ 245/45R18을 Compound만 다르게 해서 Snow 평가를 진행하였다. 예상한대로 Tg가 낮은 Compound가 Snow성능이 좋게 나왔다. Abaqus Block 강성 해석을 통해 Tire 강성을 찾아내었다. Case 2 : Winguard Sport 2 _ 225/55R17을 Compound만 다르게 해서 Snow 평가를 진행하였다. Case1보다는 규격이 작아 Block 강성 값이 낮다. 예상과는 반대로 Tg가 낮은 Compound가 Snow성능이 안 좋게 나왔다. Abaqus Block 강성 해석을 통해 Tire 강성을 찾아내었다. Case 3 : 자사 Snow Pattern중의 하나인 N Priz AH8 _ 215/55R17을 Compound만 다르게 해서 Snow 평가를 진행하였다. 예상한대로 Tg가 낮은 Compound가 Snow성능이 좋게 나왔다. Abaqus Block 강성 해석을 통해 Tire 강성을 찾아내었다. Case 4 : 자사 Snow Pattern중의 하나인 N Fera AU7 _ 215/55R17을 Compound만 다르게 해서 Snow 평가를 진행하였다. Case 3과는 규격 동일, 패턴이 다르다. 예상과는 반대로 Tg가 낮은 Compound가 Snow성능이 안 좋게 나왔다. Abaqus Block 강성 해석을 통해 Tire 강성을 찾아내었다. 결론 : Tire Block 강성에 따라 Compound Tg의 저온 유연성이 발휘되는 구간이 존재 한다. Tg가 낮을수록 Compound 성능이 좋아지는 Block 강성 구간 : 43286.2 ~ 44344.3 〈그림 본문 참조〉