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Steering Wheel의 Dynamic Damper 고유진동특성 조절 연구
박동진(Dong Jin Park),범형택(Hyung Taek Bum),홍찬호(Chan Ho Hong) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Steering wheel basically takes charge of steering mechanism function of cars. Furthermore, it is the most connected interface with drivers not only to reduce the impact of crash by airbag but also to control many convenient gadgets such as audio, cruise and bluetooth. The vibration directly-sensed by drivers through a steering wheel is the major factor to degrade the quality of inner space of a car: this vibration can make drivers emetic or dizzy. Steering wheel should not only fulfill basic demands but guarantee the proper level of the frequency to avoid resonance phenomena, fatigue failure due to a specific frequency. To satisfy this, we can strengthen steering wheel itself or modulate the frequency with a special component, dynamic damper. Dynamic damper is the component of a car that diminishes the vibration generated during driving attached to the vibrating source or conveyer. In particular, dynamic damper is attached to column shaft which is directly connected to steering wheel to damp the vibration transmuted to the wheel. For some sort of cars, in order to improve the efficiency of steering wheel or column shaft, steering wheel is equipped with dynamic damper inside so that it can reduce the microvibration transmitted via column shaft and provide more comfortable environment to drivers. In this study, we introduced the basic principles and properties of dynamic damper to steering wheel, understand the factors which control the proper frequency, and proposed the designing of more effective steering wheel which overcome the limit of inner space. For this purpose, we simplified the previous model of dynamic damper using CATIA V5 and analyzing Mode with Nastran FX. We used physical properties of present model of dynamic damper for all model. Mass and rubber is the major decisive component to the frequency of dynamic damper. By varying the outward shape of mass and the contact point of rubber and mass, we checked the consequential change of the frequency of dynamic damper and provided the proper direction and range of it. If we can control the frequency of dynamic damper by the length of rubber, we will expect the more improved Steering Wheel for overcoming the limit of inner space.
쾌속 3차원 조형 시스템을 활용한 장신구 제작방법의 개발
이호용,임중연,김경아,범형택 東國大學校 1998 東國論叢 Vol.37 No.-
This paper is concerned with the new production method for jewelry by using rapid prototyping system. this system can directly produce the three-dimensional prototype shape of jewelry based on CAD modeling. Recently, rapid prototyping technology has been regarded as a powerful concurrent tool for integrating design and manufacturing process. In view of this, our study focuses the attention on the new application of this technology into the prototype production of jewelry which has been manufactured almost by hand. The characteristics of various RP systems are presented and one distinct jewelry example has been produced to show that out method is quick and efficient.
이호용(Ho Yong Lee),임중연(Joong-Yeon Lim),범형택(Hyoung Taek Bom) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
This study is concerned with the structural analysis of car seat frame by the finite element method. The load-deformation characteristics are simulated according to the test requirements of U.S(FMVSS). Three-dimensional modeling techque is applied to the components of seat frame and the shell, solid, gap elements are employed to model the car seat frame assembly. Numerical results show that the recliner and knuckle plate are identified as the possibie weak part of frame, and this results are well consistent with experimental ones.The current analysis model can provide useful informations to design a new car seat and can reduce the overall design cost and time.<br/>