The Method for Determining the Threaded Connection Parameters of Projectile-fuze System Based on Thin-layer Element Model

doi:10.3969/j.issn.1000-1093.2021.04.008

Abstract

Abstract: Threaded connection is one of the main connection modes of projectile body and fuze body, which affects the vibration response characteristics of projectile-fuze system directly. For the problem that the existing numerical simulation methods are difficult to characterize the threaded connection accurately, a thin-layer element method is peoposed to simulate the threaded connection, and a determination method for the material parameters of thin-layer element is established through theoretical and experimental research. The material parameters of thin-layer element are determined based on the elastic model of threaded connection and thin-layer element theory.The determined material parameters of thin-layer element are applied to the finite element model. The calculation accuracy of thin-layer element model is verified by the modal test of threaded tube and projectile-fuze system. Compared with the modal test results of threaded pipes with different pitch and thread length, the maximum calculated error of the thin-layer element model is 5.11%. Moreover, compared with the nodes fusion method, the maximum error of the first third-order modal frequency decreases from 17.72% to 2.54% after using thin-layer element method for the projectile-fuze system.

Key words: projectile-fuzesystem, threadedconnection, modeltest, thin-layerelement, elasticmodel, dynamicresponseanalysis

CLC Number:

TJ430.2

YAN Amin， PI Aiguo， WANG Jian， HUANG Fenglei， WANG Xiaofeng. The Method for Determining the Threaded Connection Parameters of Projectile-fuze System Based on Thin-layer Element Model[J]. Acta Armamentarii, 2021, 42(4): 743-754.

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