안전도를 고려한 전동 틸트/텔레스코픽 조향주의 해석 및 설계

신문균,홍성우,박경진,Sin, Mun-Gyun,Hong, Seong-U,Park, Gyeong-Jin 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.6

The design process of the motor driven tilt/telescopic steering column is established by axiomatic design approach in conceptual design stage. By selecting independent design variables for improvin g performance of the steering system, each detailed design can be carried out independently. In the detailed design, the safety in crash environment and vibration reduction are considered. An occupant analysis code SAFE(Safety Analysis For occupant crash Environment) is utilized to simulate the body block test. Segments, contact ellipsoids and spring-damper elements are used to model the steering column in SAFE. The model is verified by the result of the body block test. After the model is validated, the energy absorbing components are designed using an orthogonal array. Occupant analyses are performed for the cases of the orthogonal array. Final design is determined for the minimum occupant injury. For vibrational analysis, a finite element model of the steering column is defined for the modal analysis. The model is validated by the vibration experiment. Size and shape variables are selected for the optimization process. An optimization is conducted to minimize the weight subjected to various constraints.

하수체와 생식선과의 기능관계에 대한 소고

신문균 대한수의사회 1988 대한수의사회지 Vol.24 No.8

성장중인 수흰쥐의 거세가 혈청LH 와 FSH수준 , 체중 및 정낭중량에 미치는 영향

신문균,정영채,김창근,정영호,김형태 ( M . K . Shin,Y . C . Chung,C . K . Kim,Y . H . Chung,H . T . Kim ) 한국축산학회 1982 한국축산학회지 Vol.24 No.3

The purpose of this experiment was to investigate the effects of castration on serum LH and FSH level, body weight and seminal vesicle weight in growing male rats. The animals used in this experiment were 60 male rats of Wister Imamichi strain weighing 93.03±4.02g at 42 days of age. Five rats from each group were randomly sacrificed on the day of castration and at 1st, 2nd, 3rd, 4th and 5th week after castration. Seurm eras separated from the blood which was obtained by cardiac puncture and the serum was assayed for LH and FSH level by radioimmunoassay. Changes of the body weights were measured before sacrificing. Seminal vesicles were removed after obtaining blood and the weights were measured. The results which were obtained in this experiment were as follows: 1. Serum LH levels in castrated groups were increased gradually after castration and after 2 weeks of castration the levels were increased significantly (P$lt;0.05) as compared with the intact control groups. After 3 weeks of castration the serum LH level began to decrease and then maintained the same level to 5 weeks after castration. However, the serum LH level in the castrated groups were higher than those of the intact control groups at all periods. 2. Serum FSH levels in castrated groups were greatly increased after 1 week of castration. But the level began to decrease after 2 weeks of castration and got back to the level of the day of castration after 5 weeks of castration. The serum FSH levels in the castrated groups were higher than those of the intact control groups at all periods. 3. There were no differences in the both groups at 2 weeks of castration in body weights of growing male rats. From 3 weeks to 5 weeks after castration the body weights of the castrated groups were increased less than those of the intact control groups. 4. The weights of seminal vesicles in the castrated groups began to decreased from the first week of castration. After 4 weeks of castration the weights of seminal vesicles were significantly decreased (P$lt;0.05) and at 5th week after castration the weight of seminal vesicles were significantly decreased in the castrated group (P$lt;0.01) as compared with intact control group.

회원작품 - 해나 하우스

신문균,Shin, Mungyun 대한건축사협회 2019 建築士 Vol.599 No.-

국산차의 충격시 승객해석에 대한 모델링및 분석

신문균,박경진,김형중,정근섭 한국자동차공학회 1991 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

자동차 충돌시 승객의 안전도 및 차량의 충돌현상을 해석하기 위해서는 일반적으로 차량을 직접부수어 측정하는 Crash Test 가 행해진다. 그러나 승객의 안전도에 영항을 미치는 여러가지 매개변수의 영양을 이 Crash Test 를 통해서 해석하기 위해서는 많은 수의 실험이 필요하며, 동 적인 상태에서 하는 실험이기 때문에 고가의 실험장비와 경비가 필요하다 . 따라서 선진 여러 나라에서는 실험 비용이 많이 드는 Crash Test 의 횟수를 줄이기 위한 방법무로 컴퓨터 시뮬레이션을 이용한다.<br/> 본 연구에서는 국산차의 충돌시 승객거동해석을 위한 모델링 및 그의 검토를 위해 3차원 해석이 우수한 CAL3D를 이용하며, 이 프로그램에 국산차의 Crash Test 결과와 동력학격인 상태를<br/> 입력으로 넣어 시뮬레이션 한다. 이 시뮬레이션 하는 과정에 HIC(Head Injury Criterion) 값, 머리, 가슴, 골반의 가축도 좌이 Crash Test 에서의 HIC 값, 머리, 가슴, 골반의 가속도 값에 근사하도록 입력 데이타를 조절 (Tuning) 함으로써, 승객의 안전도 문제에 있어서 국산차의 충격모델을 확립한다.

접촉이론을 이용한 승객거동해석 소프트웨어용 접촉력의 계산

신문균(M.K.Shin),임재문(J.M.Lim),박경진(G.J.Park) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2

The contact force between the dummy and the interior parts of the car is the important index that affects the behavior of the dummy. The contact algorithm for the occupant analysis software is enhanced by a contact theory which is an extension of the Hertz equation in plastic range. Young's modulus and the Poisson's ratio are used for the explicit equations. The contact force can be estimated without the force-deflection function from experiments.<br/>

자동차 충돌문제에 MDO를 적용하기 위한 시스템 해석방법

신문균(Moonkyun Shin),김창희(Changhee Kim),박경진(Gyungjin park) 한국자동차공학회 2003 한국 자동차공학회논문집 Vol.11 No.5

MDO (multidisciplinary design optimization) technology has been proposed and applied 10 solve large and complex optimization problems where multiple disciplinaries are involved, In this research, an MDX) problem is defined for automobile design which has crashworthiness analyses. Crash model which arc consisted of airbag, belt integrated seat (BIS), energy absorbing steering system ,and safety belt is selected as a practical example for MDO application to vehicle system. Through disciplinary analysis. vehicle system is decomposed into structure subspace and occupant subspace, and coupling variables are identified. Before subspace optimization, values of coupling variables at given design point must be determined with sys1em analysis. The system analysis in MDO is very important in that the coupling between disciplines can he temporary disconnected through the system analysis, As a result of system analysis, subspace optimizations are independently conducted, However. in vehicle crash, system analysis methods such as Newton method and fixed-point iteration can not be applied to one, Therefore. new system analysis algorithm is developed to apply to crashworthiness. It is conducted for system analysis to determine values of coupling variables. MDO algorithm which is applied to vehicle crash is MDOIS (Multidisciplinary Design Optimization Based on Independent Subspaces), Then, structure and occupant subspaces are independently optimized by using MDOIS.<br/>

下垂體와 生殖腺과의 機能關係에 대한 小考

申文均 한국동물생명공학회(구 한국동물번식학회) 1988 Reproductive & developmental biology Vol.12 No.2

후방추돌시 목상해를 고려한 승객거동해석 및 좌석설계

신문균(Moon-kyun Shin),박기종(Ki-jong Park),박경진(Gyung-jin Park) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.9

Occupant injury in rear end impact is rapidly becoming one of the most aggravating traffic safety problems with high human suffering and societal costs. Although rear end impact occurs at relatively low speed, it may cause permanent disability due to neck injUlies resulting from an abrupt moment, shear force, and tension/compression force at the occipital condyles. The analysis is performed for a combined occupant-seat model response, using the SAFE(Safety Analysis For occupant crash Environment) computer program. The computational results are verified by those from sled tests. A parameter study is conducted for many physical and mechanical properties. Seat design has been performed based on the design of experiment process with respect to five parameters: seat-back upholstery stiffness, torsional stiffness of the seat-back, headrest upholstery stiffness, the clearance between occupant's head and the headrest, and friction coefficient of the seat-back. An orthogonal array is selected from the parameter study. A good design has been found from the analysis results based on the orthogonal array. The results show that reductions of stiffness in seat-back upholstery and joint are the most effective for preventing neck injuries.

[동력전단계부문] 안전도를 고려한 전동 틸트/텔레스코픽 조향주의 해석 및 설계

신문균(S.W. Hong),홍성수(M.K. Shin),박경진(G.J. Park),우덕현(D.H. Wuh) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

The design process of the motor driven tilt/telescopic steering column is established by axiomatic design approach in conceptual design stage. By selecting independent design variables for improving performances steering system, each detailed design can be carried out independently. In the detailed design, the safety for crash environment and vibration reduction are considered. An occupant analysis code SAFE(Safety Analysis For occupant crash Environment) is utilized to simulate the body block test. Segments, contact ellipsoids and spring-damper elements are used to model the steering column in SAFE. The model is verified by the result of the body block test. After the model is validated, the energy absorbing components are designed using an orthogonal array. Occupant analysis are performed for the cases of the orthogonal array. Final design is determined for the minimum occupant injury. For vibrational analysis, a finite clement model of the steering column is defined for the modal analysis. The model is validated by the vibration experiment. Size and shape variables are selected for the optimization process. An optimization is conducted to minimize the weight subjected to various constraints.