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首页> 外文会议>International Conference on Computer Aided Optimum Design in Engineering; 2007; Myrtle Beach,SC(US) >Optimal design of fatigue loaded heavy-duty machine spring elements
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Optimal design of fatigue loaded heavy-duty machine spring elements

机译：疲劳负载重型机器弹簧元件的优化设计

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The aim of this paper is to present results of using fundamental machine element design principles into re-designing optimally heavy-duty springs used in terrain machinery and in industry. The use of standard procedures often results in recurrent fatigue fracture failures. This reveals the need for optimal innovative design principles which are not found in standards. Analytical calculations reveal the main causes of failures to be the local bending due to eccentric highly impact force application at squared and ground ends and wearing away of the shot peening protection. Optimum design is used to solve the problem by finding the optimal spring. Goals are minimisation of wire volume, space restriction, desired spring rate, avoidance of surging and achieving reliably long fatigue life. Available fatigue dimensioning methods are used with amplitude-mean stress diagrams and S-N curve approaches. Conclusions are supported by using full 3D solid FEM analysis by which the stresses, strains, deformations and natural frequencies and modes are obtained. Then FEM is used to optimally fine tune and validate the best result.
机译：本文的目的是介绍使用基本机械元件设计原理重新设计用于地形机械和工业中的最佳重型弹簧的结果。使用标准程序通常会导致疲劳断裂复发。这表明需要标准中没有的最佳创新设计原则。分析计算表明，失效的主要原因是由于在方形和接地端施加偏心高冲击力以及喷丸保护装置的磨损而导致的局部弯曲。最佳设计用于通过找到最佳弹簧来解决问题。目标是最大程度地减少导线体积，空间限制，所需的弹簧刚度，避免喘振并可靠地延长疲劳寿命。可用的疲劳尺寸确定方法与振幅平均应力图和S-N曲线方法一起使用。通过使用完整的3D实体有限元分析，可以得出结论，从而获得应力，应变，变形以及固有频率和模式。然后使用FEM进行最佳微调并验证最佳结果。

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