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2018 Vol.31, Issue 5 Preview Page
Optimal Methodology of a Composite Leaf Spring with a Multipurpose Small Commercial Vans

다목적 소형 승합차 복합재 판 스프링의 적층 최적화 기법

Sang Ho Ahn1†
안 상 호1†
1Department of Mechanical & Automotive Engineering, Shinhan University, Uijeongbu, 11644, Korea
1신한대학교 기계자동차 융합공학과
†Corresponding author : +82-31-870-3683; drshahn@naver.com
2018. pp. 243-250
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Abstract

In this paper, design technique using genetic algorithms(GA) for design optimization of composite leaf springs is presented here. After the initial design has been validated by the car plate spring as a finite element model, the genetic algorithm suggests the process of optimizing the number of layers of composite materials and their angles. Through optimization process, the weight reduction process of leaf springs and the number of repetitions are compared to the existing algorithm results. The safety margin is calculated by organizing a finite element model to verify the integrity of the structure by applying an additive sequence optimized through the genetic algorithm to the structure. When GA is applied, layer thickness and layer angle of complex leaf springs have been obtained, which contributes to the achievement of minimum weight with appropriate strength and stiffness. A reduction of 65.6% original weight is reached when a leaf steel spring is replaced with a leaf composite spring under identical requirement of design parameters and optimization.

Keywords
optimum design
genetic algorithm
composite material
leaf spring
automobiles

본 논문에서는 복합재 판 스프링의 설계 최적화를 위해 유전자 알고리즘을 사용한 적층 최적화 과정을 제시하였다. 다목 적 소형 승합 자동차 판 스프링을 유한요소모델로 구성하여 초기 설계를 검증한 이후, 유전자 알고리즘을 통해 복합재료의 적층수와 적층각도를 최적화하는 과정을 기술하였다. 최적화 과정을 통해 판 스프링의 하중 감소과정, 반복수에 따라 강 구 조의 해석 결과와 비교하였다. 더불어 유전자 알고리즘을 통해 최적화된 적층 시퀀스를 구조에 적용하여 구조의 건전성을 검증하기 위해 유한요소 모델로 구성하여 안전여유를 계산하였다. GA를 적용할 때, 복합재료 판 스프링의 적층 두께와 적층 각을 획득하였으며, 이는 적절한 강도와 강성으로 최소 무게를 달성하는데 기여한다. 동일한 설계 매개 변수 및 최적화 조건 에서 강철된 판 스프링을 복합재 판 스프링으로 교체하면 65.6%의 중량이 감소한다.

키워드
최적 설계
유전자 알고리즘
복합재료
판 스프링
자동차
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Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 31
  • No :5
  • Pages :243-250
  • Received Date : 2018-06-27
  • Revised Date : 2018-08-26
  • Accepted Date : 2018-08-27
  • DOI :https://doi.org/10.7734/COSEIK.2018.31.5.243
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