Reliability analysis of the roller base of a counter-roller spinning machine based on the maximum entropy method

ZHENG Hongwei; MENG Guangwei; LI Feng; HUANG Tao; GUO Yaming; XUAN Mohan

doi:10.16511/j.cnki.qhdxxb.2020.26.031

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Journal of Tsinghua University(Science and Technology) ›› 2021, Vol. 61 ›› Issue (11) : 1289-1294. DOI: 10.16511/j.cnki.qhdxxb.2020.26.031

MECHANICAL ENGINEERING

Reliability analysis of the roller base of a counter-roller spinning machine based on the maximum entropy method

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Abstract

The maximum entropy method was used to develop a reliability analysis model for the roller base of a counter-roller spinning machine. The maximum entropy method was used to define the probability density expression for the performance function with the fourth-order central moments then computed using a Taylor series expansion and a finite element analysis. The fourth-order origin moments were then calculated by a standardized transformation. MATLAB was then used to solve the constrained expression for the moments to obtain the maximum entropy probability density function parameters. The parameters were fit to get the probability density curve with the failure probability of the structural function then found by integration. The error relative to a Monte Carlo simulation (MCS) was 1.61%, which shows that this method is accurate. The roller base was then optimized which reduced the failure probability after optimization by 11.42%.

Key words

counter-roller spinning equipment / reliability analysis / maximum entropy method / Taylor expansion / probability density function

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ZHENG Hongwei, MENG Guangwei, LI Feng, HUANG Tao, GUO Yaming, XUAN Mohan. Reliability analysis of the roller base of a counter-roller spinning machine based on the maximum entropy method[J]. Journal of Tsinghua University(Science and Technology). 2021, 61(11): 1289-1294 https://doi.org/10.16511/j.cnki.qhdxxb.2020.26.031

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