• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 27 Issue 5
Oct.  2014
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Article Contents
WANG Hong, TANG Jinsong, LIU Wanxuan. Reliability Optimization Design of Vehicle Variable Stiffness Spring Assembly by Fuzzy Theory[J]. Journal of Southwest Jiaotong University, 2014, 27(5): 837-841. doi: 10.3969/j.issn.0258-2724.2014.05.015
Citation: WANG Hong, TANG Jinsong, LIU Wanxuan. Reliability Optimization Design of Vehicle Variable Stiffness Spring Assembly by Fuzzy Theory[J]. Journal of Southwest Jiaotong University, 2014, 27(5): 837-841. doi: 10.3969/j.issn.0258-2724.2014.05.015

Reliability Optimization Design of Vehicle Variable Stiffness Spring Assembly by Fuzzy Theory

doi: 10.3969/j.issn.0258-2724.2014.05.015
  • Received Date: 10 Feb 2013
  • Publish Date: 25 Oct 2014
  • In order to improve the design quality of spring assembly, a fuzzy reliability optimization design model of variable stiffness spring assembly was established using the fuzzy and the reliability design theory based on traditional optimization design method. In this model, the spring stress and strength were used as a random variable and a fuzzy variable, respectively; and the static strength, fatigue strength, stability, and quality factors were synthetically considered. In addition, taking a new type of variable stiffness spring assembly of a freight car as the object, an optimization analysis was carried out by used of the proposed model. The calculation results show that compared with the original design program, the model increases the static deflection of vehicle in empty and heavy load 5.4 and 3.2 mm, respectively; and in the mean time decreases the total quality of the spring assembly by about 15.8%. Therefore, the fuzzy reliability optimization design model can meet the design requirements.

     

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