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마찰력이 작용하는 동적 시스템의 점착 구현을 위한 마찰모델 제안 및 정확성 검증

Title
마찰력이 작용하는 동적 시스템의 점착 구현을 위한 마찰모델 제안 및 정확성 검증
Other Titles
A Dry Friction Model to Realize Stick for Simulation of the System with Friction and Accuracy Verification of the Friction Model
Author
유홍희
Keywords
쿨롱 마찰 모델; 점착; 마찰진동자; 정적 천이 속도; 탄성 변형 한계; Coulomb Friction Model; Stick; Friction Oscillator; Static Threshold Velocity; Elastic Deformation Limit
Issue Date
2012-12
Publisher
한국소음진동공학회
Citation
한국소음진동공학회 논문집, 2012, 22(80), P.748-755, 8P.
Abstract
Friction causes self-excited vibration, stick-slip vibration and any other friction-induced phenomena. That kinds of vibrations cause chatter and squeal. In order to predict such vibrations accurately, employing an accurate friction model is very important because a dynamic behavior of a system with friction is dominantly governed by a friction model. A Coulomb friction model is the most widely known model. Coulomb friction model is useful model to obtain analytical solutions of the system with friction and the model gives relatively good simulation result. However, defining a friction force at a stick state in simulation is hard because of the characteristic itself and a Coulomb friction model is discontinuous function between a static and a dynamic friction coefficient. Therefore, applying the Coulomb friction model to a simulation is not appropriate. In order to resolve these problems, an approximated Coulomb friction model was developed using simple and continuous function. However, an approximated Coulomb friction model cannot realize stick. Therefore, an approximated Coulomb friction model cannot describe friction phenomena accurately. In order to analyze a friction phenomenon accurately, a friction model for a simulation was proposed in this paper. A proposed friction model realizes stick and gives reasonably good results compared to results obtained by the simulation employing an approximated Coulomb friction model. Accuracy of a proposed friction model was verified by comparing experimental results.
URI
http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=SOJDCM_2012_v22n8_748http://hdl.handle.net/20.500.11754/48720
ISSN
1598-2785; 2287-5476
DOI
10.5050/KSNVE.2012.22.8.748
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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