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基于EMA理论的木/竹复合客车底板参数识别技术(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2009年02期
Page:
103
Column:
研究论文
publishdate:
2009-03-30

Article Info:/Info

Title:
Parameter identification of woodbamboo composites used as the busplatform using EMA theory
Author(s):
YANG Shuqin1 YANG Jiafu2* LUO Jiangli3 ZHANG Xiaodong4
1.Nanjing Yingtian College, Nanjing 210046, China; 2.College of Electronic and Mechanical Engineering, Nanjing Forestry University, Nanjing 210037, China; 3.Chengdu Aeronautic Vocational and Technical College, Chengdu 610021, China; 4.Bamboo Engineering R
Keywords:
woodbamboo composite busplatform modal analysis parameter identification
Classification number :
S781
DOI:
10.3969/j.jssn.1000-2006.2009.02.025
Document Code:
A
Abstract:
A newly woodbamboo composite material was used as the busplatform. Modal parameter was identified using the Experiment Model Analysis (EMA). The modal parameter (the natural frequency and damping ratio ) of woodbamboo composites used as the busplatform were analyzed by means of impulse excitation as well as the technique of signal processing. According to the impulse response function and real frequency/imaginary frequency figure under free end bearing and cantilever beam condition. The results showed that for the same species, the natural frequency under free end bearing condition was smaller 2% than that under cantilever beam condition. For the same supporting, the transverse natural frequency was smaller than the lengthways natural frequency .This provided a basis in dynamic design and modification. Furthermore, this simple and effective approach could also be used as a reference for any test of the dynamic characteristic at lowmodes vibration.

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Last Update: 2009-03-30