Specifications

freedom of the drilling shaft system are reduced significantly whereas nonlinear degrees of
freedom of the system are retained in the physical space. A modified Newton shooting method is
used to obtain the periodic trajectories of the dynamic system. The advantage of this method has
reduced much of the computational cost in the past, and the hydrodynamic forces of cutting fluid,
cutting forces and unbalance forces can easily be added to the system equations. Further, the
numerical schemes of this study are applied to a large-scale deep-hole drill machine with two
intermediate supports. The periodic dynamic behaviors of the drilling shaft system and the region
of unstable rotation are investigated numerically, whereby revealing some interesting
phenomena. © 2013 Elsevier Ltd.
Number of references: 30
Main heading: Mathematical transformations
Controlled terms: Cutting fluids - Drills - Dynamic response - Dynamics - Finite
element method - Linear transformations - Nonlinear equations - Offshore
pipelines - Shear flow
Uncontrolled terms: Deep hole drilling - Drilling shaft - Governing
equations - Hydrodynamic forces - Intermediate support - Modal reduction - Nonlinear
components - Periodic trajectories
Classification code: 931.1 Mechanics - 921 Mathematics - 619.1 Pipe, Piping and
Pipelines - 607.1 Lubricants - 603.2 Machine Tool Accessories - 421 Strength of Building
Materials; Mechanical Properties - 408.1 Structural Design, General
DOI: 10.1016/j.ijnonlinmec.2013.06.004
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
7.
Accession number: 20132816484494
Title: Numerical experiment research of microstructure and loading rate affect on
concrete compressive property
Authors: Lei, Guangyu1 ; Dang, Faning1 ; Li, Qian1 ; Pan, Feng1/雷光宇;党发宁;李倩;;
Author affiliation:
1 Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author: Lei, G. ([e-mail])
Source title: Tumu Gongcheng Xuebao/China Civil Engineering Journal
Abbreviated source title: Tumu Gongcheng Xuebao
Volume: 46
Issue: SUPPL.2
Issue date: May 2013
Publication year: 2013
Pages: 79-85
Language: Chinese
ISSN: 1000131X
Document type: Journal article (JA)
Publisher: Editorial Office of China Civil Engineering Journal, 9 Sanlihelu, Beijing, 100835,
China
Abstract: In order to study the mechanical behavior of concrete material under the dynamic