Reliability Analysis of the Hydraulic Cylinder Based on Non-probabilistic Convex Model
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摘要: 300MN模锻水压机是我国国防和基础建设的关键设备,液压缸作为液压机重要组成部分,其可靠性的高低直接影响到液压机的生产效率。选取液压缸材料杨氏模量、强度极限以及其所受载荷为非概率区间设计变量。采用拉丁方试验设计方法,采样选取采样点,运用最小二乘二阶响应面模型拟合出模型的响应面方程。依据非概率凸模型理论,得到模型的可靠性指标为2.054 7,从而证明液压缸可靠。Abstract: 300MN forging hydraulic press is the essential equipment of the national defense and the basic construction of our country.The cylinder is an important part of the hydraulic press,the reliability of the hydraulic cylinder affects directly to the production efficiency of the hydraulic presses.This paper selected the material young's modulus,ultimate strength,pressure load inside of the hydraulic cylinder as design variables.Firstly,sampling points were obtained by using latin hypercube experimental design method,and then approximate equation of the model was built by using response surface approximately method.Finally,hydraulic cylinder's reliability index was obtained by using non-probabilistic convex model.As the model's reliability index is 2.054 7,so it proves that the hydraulic cylinder is reliable.
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