Overall Load Extrapolation Method Based on Frequency and Extreme Value Extrapolation

被引：0
|
作者：
Gao H. [1 ]
Shan C. [1 ]
Liu J. [1 ]
Zhang F. [1 ]
Liu P. [1 ]
机构：
[1] Northwest Institute of Mechanical & Electrical Engineering, Shaanxi, Xianyang
来源：
Binggong Xuebao/Acta Armamentarii | 2024年 / 45卷 / 06期
关键词：
kernel density estimation; load extrapolation; Markov Chain Monte Carlo method; Markov steady-state distribution; Metropolis-Hastings sampling;
D O I：
10.12382/bgxb.2023.0072
中图分类号：
学科分类号：
摘要：
Load extrapolation, as an important technical means for compiling load spectra, is inconvenient to generate the high-precision load spectra to support equipment performance design due to lacking of the comprehensive review of overall load extrapolation method, the insufficient adaptability of solution method for Markov steady-state distribution, and the comparison and selection principles for different nonparametric frequency extrapolation methods. Focusing on the compilation of tank爷 s load spectrum under high mobility and extreme conditions, the nonparametric extrapolation method based on rain flow matrix and kernel density estimation, the signal reconstruction based on Markov Chain Monte Carlo (MCMC) method, and the Metropolis-Hastings (MH) direct sampling method are used to perform the frequency extrapolation according to the barrel displacement dataset of a tank in motion. Besides, an improved Markov steady-state distribution solution method is proposed for the signal reconstruction method of MCMC. Finally, the proposed overall frequency-extreme load extrapolation method is used to expand the frequency and predict the extreme values of the dataset. The accuracy of overall method is verified based on experimental results. It is shown that the improved Markov steady-state distribution solution method is effective. The MH direct sampling method can be used as a new frequency extrapolation method when the sample length is sufficient and the extrapolation accuracy is not very high. The accuracy of overall frequency-extreme load extrapolation method is relatively high. The principles for selecting frequency extrapolation methods have certain guiding significance for the selection of methods in the process of compiling the load spectra. The research work provides a mature technical route and reference for the high-quality equipment load spectra compiling. © 2024 China Ordnance Industry Corporation. All rights reserved.
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页码：1942 / 1953
页数：11
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