2017 Vol. 38, No. 9

Display Method:
A Time Domain Identification Method for Distributed Dynamic Loads on 1D Spatial Structures
WAN Cheng, YAN Bo
2017, 38(9): 967-978. doi: 10.21656/1000-0887.380006
Abstract(1294) PDF(811)
Abstract:
A time domain identification method for distributed dynamic loads on 1D spatial structures was proposed. Based on the idea of spatial and temporal divisions, the formula and process for load time history identification were derived. The load identification program was compiled by means of MATLAB, an...
An Improved Adaptive Chaos Control Method for Inverse Reliability Analysis
LI Bin, HAO Peng, MENG Zeng, LI Gang
2017, 38(9): 979-987. doi: 10.21656/1000-0887.380001
Abstract(1394) PDF(1461)
Abstract:
The adaptive chaos control (ACC) method was an efficient and robust method for inverse reliability analysis. However, for strongly nonlinear concave performance functions, the computational efficiency of ACC still needs to be enhanced. Moreover, it might be trapped in the local optimum. Through revi...
A Symplectic Approach for Boundary-Value Problems of Linear Hamiltonian Systems
JIANG Xian-hong, DENG Zi-chen, ZHANG Kai, WANG Jia-qi
2017, 38(9): 988-998. doi: 10.21656/1000-0887.370365
Abstract(1393) PDF(898)
Abstract:
A symplectic approach based on canonical transformation and generating functions was proposed to solve boundary-value problems of linear Hamiltonian systems. According to the relationship between the generating function and the state-transition matrix, an interval merge recursive algorithm was const...
A Modified Gradient Elastic Theory Considering Damage
ZHAO Bing, LIU Tao, HE Jian-hui, ZHU Hao-rui, LI Wei
2017, 38(9): 999-1008. doi: 10.21656/1000-0887.370285
Abstract(1164) PDF(954)
Abstract:
To describe the material mechanics behaviors depending on microstructure, the gradient elastic theory with significant advantages was investigated. The gradient elastic theory was combined with the damage theory to consider the influence of microstructure on material failure. Then a modified gradien...
The Explicit Expression of Erdogan’s Fundamental Solution for Plane Problems With Cracks
XU Zhi, FAN Xue-ming
2017, 38(9): 1009-1020. doi: 10.21656/1000-0887.370253
Abstract(1323) PDF(487)
Abstract:
The fundamental solution plays an essential role in many numerical methods such as the boundary element method (BEM), the method of fundamental solution and the boundarytype meshless methods. For fracture problems, application of fundamental solutions in domains with cracks can avoid deeming the cr...
Stress Distribution Analysis of the Casings Under Suspended Packer Slips
HE Xia, LI Ming, WANG Guo-rong, ZHANG Min
2017, 38(9): 1021-1028. doi: 10.21656/1000-0887.370271
Abstract(1183) PDF(932)
Abstract:
The slips in a suspended packer are very important components to ensure success of the horizontal well reconstruction technology. They can support and fasten the packer and lock the rubber when they are anchored. But the casing is liable to failure under the effect of slips since it’s a thinwall cy...
Numerical Analysis of Geometrically Nonlinear Problems Based on the S-R Decomposition Theorem
SONG Yan-qi, HAO Liang-jun, LI Xiang-shang
2017, 38(9): 1029-1040. doi: 10.21656/1000-0887.370229
Abstract(1356) PDF(495)
Abstract:
To explore the numerical solution method for geometrically nonlinear problems, the theoretical derivation, the MATLAB programming and the finite element simulation were used together. Based on the S-R decomposition theorem, the interpolated element-free Galerkin method was applied to deduce the incr...
Study of Kilometer Drilling Stability at Different Strata Beneath the Floor
SHI Zhan-shan, LIANG Bing, WANG Yan, QIN Bing
2017, 38(9): 1041-1052. doi: 10.21656/1000-0887.370234
Abstract(865) PDF(880)
Abstract:
The stability of gas drainage drilling affects the quality of extraction engineering. Under the action of mining, underfloor kilometer drillings distributed at different horizons have different loading and unloading paths. To get the influence of mining on borehole stability, the loading and unloadi...
The Nonlinear KdV Equation Under External Forcing With the Complete Coriolis Force
YIN Xiao-jun, YANG Lian-gui, SONG Jian, ZHANG Rui-gang, YANG Hong-li>, LIU Quan-sheng
2017, 38(9): 1053-1060. doi: 10.21656/1000-0887.370297
Abstract(1257) PDF(484)
Abstract:
The nonlinear KdV equation under external forcing was deduced from the potential vorticity equation involving both the vertical and the horizontal components of the Coriolis force with the perturbation method near the equatorial Rossby waves. Then the periodic solution of the model was obtained by m...
Classical Solutions of Motion for Dyon Systems
XU Xue-yan, CHEN Hai-bo, ZHANG Hong-bin, DING Guang-tao
2017, 38(9): 1061-1070. doi: 10.21656/1000-0887.380046
Abstract(1357) PDF(517)
Abstract:
According to the mechanics theories and the classical electromagnetism, the motion of 2-dyon systems was studied. Some integrals of motion, including the energy integral, the total angular momentum integral and the Runge-Lenz-like integral, were derived from the differential equations of motion for ...
Modified Halpern Iteration and Viscosity Approximation Methods for Split Feasibility Problems in Hilbert Spaces
YANG Li, LI Jun
2017, 38(9): 1072-1080. doi: 10.21656/1000-0887.380106
Abstract(1209) PDF(467)
Abstract:
In infinitedimensional Hilbert spaces, the modified Halpern iteration and viscosity approximation methods for solving the split feasibility problems (SFPs) were proposed. When the parameters satisfy certain conditions, it is proved that the sequences generated with the proposed algorithms converge ...