전동식 지게차의 진동저감에 대한 연구

다국어 초록 (Multilingual Abstract)

In this paper, vibration sources of an electric forklift are identified and the forklift vibrations are reduced by structural modification. For vibration identification, vibration signals are measured by an accelerometer when the forklift is moving. These signals are presented in a waterfall plot in order to find the dependency of frequency components on the forklift speed. It is found that main vibration source is tire pattern excitation. From some experiments and finite element analyses, it is also found that resonances occur because the natural frequencies of the forklift exist in usual driving speed range. To shift the natural frequencies outside the driving speed range, the connection parts between main body and loader are modified to increase stiffness. It is verified that considerable amount of vibration are reduced by the structural modification.

참고문헌 (Reference)

1 신정규, "저속차량 차체의 구조해석 및 구조최적설계" 한국자동차공학회 11 (11): 68-78, 2003

2 Lee, D. I., "Vibration Reduction of Steering Wheel and Frame of the Industrial Forklift Truck" 533-538, 1999

3 Kim, W. H., "Vibration Characteristics and Countermeasures of a Transaxle Type Forklift Truck" 912-918, 2004

4 이상권, "SUV용 액슬의 소음원 규명 및 소음 저감을 위한 액슬의 구조변경에 관한 연구" 한국소음진동공학회 16 (16): 582-592, 2006

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7 Dary L. Logan, "A First Course in the Finite Element Method" Brooks/Cole 2002