2011 Vol. 32, No. 8

Display Method:
Study on Combined Resonance of Low Pressure Cylinder-Generator Rotor System With Bending-Torsion Coupling
LI Jun, CHEN Yu-shu
2011, 32(8): 895-911. doi: 10.3879/j.issn.1000-0887.2011.08.001
Abstract(1937) PDF(947)
Abstract:
The nonlinear model of the low pressure cylinder-generator rotor system was presented for the study of sub-synchronous resonance and combined resonance.Analytical results were obtained by the averaging method.The transition sets and bifurcation diagrams were obtained by the singularity theory for tw...
Green’s Function for T-Stress of a Semi-Infinite Plane Crack
CUI Yuan-qing, YANG Wei, ZHONG Zheng
2011, 32(8): 912-919. doi: 10.3879/j.issn.1000-0887.2011.08.002
Abstract(2136) PDF(887)
Abstract:
Green's function for the T-stress near a crack tip was addressed by an analytic function method for a semi-infinite crack lying in an elastical,isotropic,and infinite plate.The cracked plate was loaded by single inclined concentrated force at interior point.The complex potentials were obtained by a ...
Diagonal Form Fast Multipole Boundary Element Method for 2D Acoustic Problems Based on Burton-Miller BIE Formulation and Its Applications
WU Hai-jun, JIANG Wei-kang, LIU Yi-jun
2011, 32(8): 920-933. doi: 10.3879/j.issn.1000-0887.2011.08.003
Abstract(1834) PDF(909)
Abstract:
The formulations and implementation of the fast multipole BEM (FMBEM) for 2D acoustic problems were described indetail.The kernel function expansion theory was summarized,and the four building blo ks of the FMBEM-moment calculation,moment to moment translation,moment to local translation,and local t...
Application and Analysis of a Functionally Graded Piezoelectrical Rotating Cylinder as a Mechanical Sensor Subjected to Pressure and Thermal Loads
G. H. Rahimi, M. Arefi, M. J. Khoshgoftar
2011, 32(8): 934-945. doi: 10.3879/j.issn.1000-0887.2011.08.004
Abstract(1842) PDF(775)
Abstract:
The exact thermoelastic analysis of a functionally graded piezoelectrical (FGP) rotating cylinder was investigated analytically.The cylinder was subjected to a combination of electrical,thermal and mechanical loads simultaneously.This structure was a simplified model of a rotational sensor or actuat...
Model Reduction and Active Control of a Flexible Beam Using Internal Balance Technique
XIE Yong, ZHAO Tong, CAI Guo-ping
2011, 32(8): 946-955. doi: 10.3879/j.issn.1000-0887.2011.08.005
Abstract(1713) PDF(820)
Abstract:
The internal balance technique was effective for model reduction in flexible structures,especially ones with dense frequencies.However,due to the difficulty in extracting internal balance modal coordinates from physical sensor readings,research so far on this topic has been mostly theo retic and lit...
Collision Efficiency of Two Nanoparticles With Different Diameters in the Brownian Coagulation
WANG Yu-ming, LIN Jian-zhong
2011, 32(8): 956-963. doi: 10.3879/j.issn.1000-0887.2011.08.006
Abstract(1616) PDF(751)
Abstract:
Collision efficiency of two nanoparticles with different diameters in the Brownian coagulation was investigated.The collision equations were solved to obtain the collision efficiency for the dioctyl phthalate nanoparticle with diameter changing from 100nm to 750nm in the presence of van der Waals fo...
Effect of Turbulence Intensity on Airfoil Flow: Numerical Simulations and Experimental Measurements
LI Shao-wu, WANG Shu, WANG Jian-ping, MI Jian-chun
2011, 32(8): 964-972. doi: 10.3879/j.issn.1000-0887.2011.08.007
Abstract(1911) PDF(714)
Abstract:
Effect of the turbulence intensity of the oncoming stream on the aerodynamic characteristics of NACA-0012 airfoil was investigated by a direct numerical simulation.The numerical results were found to be consistent with the experimental measurements.Based on the finite spectral QUICK scheme,the simul...
Thin Liquid Film Morphology Driven by Electro-Static Field
Emily M. Tian, Thomas P. Svobodny, Jason D. Phillips
2011, 32(8): 973-980. doi: 10.3879/j.issn.1000-0887.2011.08.008
Abstract(1992) PDF(809)
Abstract:
The development of stationary patterns on a thin polymer surface subject to an electric field was studied by means of a hexagonal-planform weakly nonlinear stability analysis and numerical simulations.The time evolution of the interface between air and polymer film on the unbounded spatial domain wa...
Effects of Magnetic Field,Porosity and Wall Properties for Anisotropically Elastic Multi-Stenosis Arteries on the Characteristics of Blood Flow
Kh. S. Mekheimer, Mohamed H. Haroun, M. A. El Kot
2011, 32(8): 981-997. doi: 10.3879/j.issn.1000-0887.2011.08.009
Abstract(1776) PDF(717)
Abstract:
A mathematical model for blood flow through an elastic artery with multi-stenosis under effect of a magnetic field in a porous medium was presented.The arterial segment under consideration was simulated by an anisotropically elastic cylindrical tube filled with a viscous incompressible electrically ...
Chemical Reaction Effects on an Unsteady MHD Flow Past a Semi-Infinite Vertical Porous Plate With Viscous Dissipation
J. A. Rao, S. Shivaiah
2011, 32(8): 998-1010. doi: 10.3879/j.issn.1000-0887.2011.08.010
Abstract(2010) PDF(730)
Abstract:
A chemical reaction effect on an unsteady magnetohydrodynamic flow past a semi-infinite vertical porous plate with viscous dissipation was analyzed.The governing equations of motion,energy and species were transformed into ordinary differential equations using time dependent similarity parameter.The...
Generalized Riemann Problem for Gas Dynamic Combustion
LIU Yu-jin, SHENG Wan-cheng
2011, 32(8): 1011-1020. doi: 10.3879/j.issn.1000-0887.2011.08.011
Abstract(1930) PDF(721)
Abstract:
The generalized Riemann problem for gas dynamic combustion in a neighborhood of the origin(t>0)in the(x,t)plane was considered.Under the modified entropy conditions, the solutions were constructed uniquely,which were the limits of the selfsimilar ZND combustion model.It was found that,for some cases...