A new hysteretic damping model and application for the combined finite-discrete element method (FDEM)

doi:10.1016/j.enganabound.2021.08.021

	A new hysteretic damping model and application for the combined finite-discrete element method (FDEM)
	Deng, Penghai 1,2; Liu, Quansheng 1,2; Huang, Xing 3; Ma, Hao 4
刊名	ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
	2021-11-01
卷号	132 页码:370-382
关键词	Hysteretic damping Cantilever beam vibration Underground tunnel excavation Rock slope slip Combined finite-discrete element method (FDEM)
ISSN号	0955-7997
DOI	10.1016/j.enganabound.2021.08.021
英文摘要	In the field of mechanical numerical simulation, damping is always a vital parameter. However, in the combined finite-discrete element method (FDEM), the current application of damping is insufficient. Therefore, in this paper, a new hysteretic damping model and its corresponding critical damping coefficient acquisition method are proposed. Furthermore, simulations of quasi-static tunnel excavation and quasi-dynamic rock slope slip are employed to investigate the influence of different hysteretic damping ratios on the numerical results. The study results show that the new hysteretic damping model, which is independent on the calculation time step, considers the effects of the element size, Young's modulus and material density and can obtain the critical damping coefficient by comprehensively using cantilever beam vibration numerical modelling and theoretical equations. In addition, the sensitivity of quasi-static tunnel excavation to the hysteretic damping ratio is very weak; however, for quasi-dynamic rock slope slip simulation, the damping ratio eta has a substantial influence on the simulation results. The new hysteretic damping model proposed in this paper is important for improving the accuracy of FDEM numerical simulation results, especially for quasi-dynamics simulation.
资助项目	Natu-ral Science Foundation of China[41941018] ; Natu-ral Science Foundation of China[52074258] ; Natu-ral Science Foundation of China[41907256] ; Fundamental Research Funds for the Central Universities[2042020kf1035]
WOS研究方向	Engineering ; Mathematics
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000691788900001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27865]
专题	中科院武汉岩土力学所
通讯作者	Liu, Quansheng
作者单位	1.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov, Wuhan 430072, Peoples R China 2.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 4.Natl Ctr Int Joint Res Green Met Min, Beijing 102628, Peoples R China
推荐引用方式 GB/T 7714	Deng, Penghai,Liu, Quansheng,Huang, Xing,et al. A new hysteretic damping model and application for the combined finite-discrete element method (FDEM)[J]. ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,2021,132:370-382.
APA	Deng, Penghai,Liu, Quansheng,Huang, Xing,&Ma, Hao.(2021).A new hysteretic damping model and application for the combined finite-discrete element method (FDEM).ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,132,370-382.
MLA	Deng, Penghai,et al."A new hysteretic damping model and application for the combined finite-discrete element method (FDEM)".ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 132(2021):370-382.