J4 ›› 2013, Vol. 40 ›› Issue (3): 126-131.doi: 10.3969/j.issn.1001-2400.2013.03.019

• Original Articles • Previous Articles     Next Articles

Dynamic characteristic analysis of intelligent beams structures  based on the correlation of interval parameters

WANG Minjuan1,2;CHEN Jianjun1;ZHOU Yubao3;YUN Yonghu1;MA Hongbo1   

  1. (1. Ministry of Education Key Lab. of Electronic Equipment Structure, Xidian Univ., Xi'an  710071, China;
    2. School of Automation, Xi'an Univ. of Posts and Telecommunications, Xi'an  710121, China;
    3. The 771th Institute, 9th Academy, China Aerospace Science Technology Corporation, Xi'an  710075, China)
  • Received:2012-01-13 Online:2013-06-20 Published:2013-07-29
  • Contact: WANG Minjuan E-mail:wang.min.juan@126.com

Abstract:

The problem of intelligent beam structural dynamic characteristic is studied under the condition that interval physical parameters are correlative. Firstly, the interval variables are turned into the product of the interval coefficients by the certain portion, and the interval coefficients are supposed to be of an allowable range, with the random variables obeying random rectangle distribution in the definition region. Secondly, The mean value and variance of interval eigenvalues equations are deduced by the Moment method for random variable function solutions under the condition that they are correlative each other. The bounds of eigenvalues are obtained by the mean value and variance of rectangle distribution. Finally, the feasibility and validity of this approach are verified by an engineering example. For comparisons, the corresponding eigenvalues ranges are obtained on the assumption that the interval variables are independent of each other and interval parameters are different in correlation.

Key words: intelligent beam, dynamic characteristic, interval analysis, random factor

CLC Number: 

  • O242