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성대운(Dae Un Sung),신천우(Chun Woo Shin),정원욱(Won Wook Jung) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
As a new vehicle is based on common vehicle platform, the durability problems of chassis components in development stage are decreasing. However a vehicle body structure is changed by exterior design and a chassis and a suspension are tuned by vehicle performance targets. The main issue on developing a new vehicle is to satisfy the durability target of a body structure and tuned suspension components. The accuracy of durability CAE analysis is mainly depending on the accuracy of input loads and boundary conditions on suspension system. The input loads should be estimated accurately. These could be changed by vehicle specifications such as vehicle weight, wheel base and so on. It is also affected by the change of suspension types and tuning parameters. This paper presents the experimental parametric study results using RLD (Road Load Data) analysis techniques. The previous research presents the effect of vehicle parameters such as vehicle weight, wheel base, wheel tread, vehicle center of gravity, tire size, tire air pressure and so on. In this research suspension types and tuning parameters such as cross member mounting are investigated. The main factors affecting on input loads and behavior of suspension components are explained.
성대운(DaeUn Sung),김진규(JinGyu Kim),정기섭(GiSeob Jeong) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The reduction of weight and cost of a new vehicle has been essential to all automotive companies. The recent improvement in CAE and analysis technique could optimize design and reduce the weight and cost of vehicle components. However, these techniques still depend upon the traditional design targets derived from previous experience and testing results. Therefore, it is important to increase the accuracy and reliability of the design targets. The optimization of driveline components plays a bigger role in weight reducing. In order to optimize the size of CVJ (Constant Variable Joins) of a vehicle, driving torque data must be estimated correctly in early development stage of a new vehicle. It is important to measure torque accurately in real usage condition, especially including misuse condition. In this paper, the measured maximum driving torque was correlated with vehicle dimension and power train output. As a result, it is possible to predict durability and strength target of driveline components in early development stage. Moreover, the size of CVJ of some vehicles could be reduced through this study.
다축-진동 시험기를 이용한 자동차 엔진룸 진동내구 시험 연구
성대운(Daeun Sung),정기섭(Giseob Jung),정승균(Seunggyoon Jung) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The interest in the accelerated reliability test of engine mounts and engine wiring harness is increasing. This paper presents a lab-simulation test which has shortened the validation period for the durability of engine mounts and the reliability of engine sensor wiring/connecter. This paper also presents the making process of the durability test mode based on the severity comparison between proving ground and field road load data. The techniques for simulation by multi-axial simulation table (MAST) and some application are also described in this paper.