Response analysis of a scraper conveyor under chain faults based on MBD-DEM-FEM

Wang, Zisheng (author), Li, Bo (author), Liang, Chao (author), Wang, Xuewen (author), Li, Jiahao (author)

To tackle the difficulty in obtaining the response data of chain and bulk coal under chain faults, this paper uses a new method for the fault simulation of scraper chains based on the coupling of multi-body dynamics (MBD), discrete element method (DEM), and finite element method (FEM). With the force and stacking angle as response values, the contact parameters of bulk coal were revised using a rotary transport test. The simplified DEM-MBD model was verified from the resistance using the point-by-point method. The static structure model of the chain was verified by the chain tensile experiment. The DEM-MBD coupling results show that when the chain is stuck or broken, the dynamic properties of the chain and bulk coal fluctuate sharply, and the wear of the medium plate increases. Based on the DEM-MBD coupling results and the DEM-FEM unidirectional coupling, the stress, strain and life were acquired, and were verified experimentally. Regarding the fracture, the Plackett-Burman test was used to determine that the crack depth, initial angle, and tensile load significantly affect the stress intensity factor (SIF). The quadratic model between significant factors and SIF was constructed using the response surface method, which provides a reference for the simulation of the scraper conveyor, the fault mechanism, and the optimization of the design of the chain.

• Language: English
• Keywords: multi-body dynamics, discrete element method, finite element method, scraper chain fault, stress intensity factor, response surface method
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: Str. 501-515
• Numbering: Vol. 67, no. 10
• PID: 20.500.12556/RUL-132526
• UDC: 531:519.62
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2021.7300
• COBISS.SI-ID: 82637059
• Publication date in RUL: 28.10.2021

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Secondary language

• Language: Slovenian
• Title: Analiza odziva strgalnega transporterja na odpoved verige na osnovi MBD-DEM-FEM
• Keywords: dinamika več teles, metoda diskretnih elementov, metoda končnih elementov, okvara verige strgalnega transporterja, faktor intenzivnosti napetosti, metoda odzivnih površin