摘要
压簧广泛地用于石油机械中,起到缓冲和减振的作用。在工作中主要承受交变载荷,失效形式是疲劳断裂。经过分析,找出其危险点,以危险点的工作应力作为参数建立了力学模型。根据应力强度干涉理论建立了疲劳可靠性模型。利用力学模型和疲劳可靠性模型对压簧进行了可靠性优化设计,以压簧体积最小作为目标函数,以压簧的尺寸和疲劳强度的可靠度作为约束条件,建立可靠性数学模型,采用MATLAB语言编程进行计算,优化后的压簧体积和尺寸都相应地减少了。最后,利用ANSYS软件计算出优化后压簧的可靠度,比优化前提高了5%。
A dish spring is widely used in petroleum mechanism, which contributes to shock absorption. The dish spring mainly bears alternating load during its working and its failure form is fatigue breaking. Through analysis, the dangerous point was found. Taking working stress of the dangerous point as a parameter, the mechanical model was constructed. Fatigue reliability model was set up according to stress-strength interference theory. The reliable optimization design was applied for the dish spring by using mechanical model and fatigue reliability model. Taking minimum volume of dish spring as objective function and taking the size and fatigue reliability of the dish spring as a constraint condition, the rdiability math model was established. After using MATLAB language for calculating, the size and volume of dish spring are decreased. At last reliability of dish spring after optimizing was calculated by using ANSYS software. Compared with its reliability before optimizing, reliability of dish spring improves 5%.
出处
《辽宁石油化工大学学报》
CAS
2006年第3期43-45,共3页
Journal of Liaoning Petrochemical University
关键词
压簧
疲劳可靠性
优化设计
Dish spring
Fatigue reliability
Optimization design
