Contact modeling of heterogeneous materials of the machine tool bed–foundation interface based on the gradient of contact stress distribution

Niu, Nana; Zhao, Yongsheng; Li, Ying; Chen, Kui; Li, Xin

doi:10.1007/s40430-022-03910-3

Cited by 2 publications

(1 citation statement)

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“…Wei et al [18] studied the estimation of furnace joint failure process by considering the influence of service life, service strength, maintenance and inspection. Wang et al [19] proposed a compilation method for Comprehensive Smoothness Evaluation (G-SCE) based on kernel density estimation (KDE).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Square-shaped Bolted Joints Based on Improved Particle Swarm Optimization Algorithm

Chen¹,

Yang²,

Zhao³

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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The bolted joint is widely used in heavy-duty CNC machine tools, which has huge influence on working precision and overall stiffness of CNC machine. The process parameters of group bolt assembly directly affect the stiffness of the connected parts. The dynamic model of bolted joints is established based on the fractal theory, and the overall stiffness of joint surface is calculated. In order to improve the total stiffness of bolted assembly, an improved particle swarm optimization algorithm with combination of time-varying weights and contraction factor is proposed. The input parameters are preloading of bolts, fractal dimension, roughness, and object thickness. The main goal is to maximize the global rigidity. The optimization results show that improved algorithm has better convergence, faster calculation speed, preferable results, and higher optimization performance than standard particle swarm optimization algorithm. Moreover, the global rigidity optimization is achieved.

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Section: Introductionmentioning

confidence: 99%