船舶力学杂志 北大期刊 CSCD期刊 统计源期刊

Numerical Research on Drag Reduction Characteristics of Supercavitating Body of Revolution

作者：FUHui-ping; LUChuan-jing; LIJie 刊期：2004年第03期

Drag reduction characteristics of supercavitating body of revolution was researched numerically with a bubble two-phase flow model embodied in commercial CFD code Fluent 6.0.The work included the effects of body shape on drag coefficient and supercavity sizes; supercavity control; drag coefficient Cd as a function of...

Unsteady Free-surface Waves Due to a Submerged Body in Two-dimensional Oseen Flows

作者：LUDong-qiang; AllenT.CHWANG 刊期：2004年第03期

The two-dimensional unsteady free-surface waves due to a submerged body moving in an incompressible viscous fluid of infinite depth is considered.The disturbed flow is governed by the unsteadyOseen equations with the kinematic and dynamic boundary conditions linearized for the free-surface waves.Accordingly, the body...

Effects of Unsymmetric Flow on a Ship Traveling in a Channel

作者：XIAJin-zhu; MIA0Quan-ming 刊期：2004年第03期

A modified Dawson's method that deals with asymmetric free-surface flow is applied to investigate the effect of the channel walls and water depth on the hydrodynamics of a ship running off the eenterline of a restricted waterway. The comparison of the numerical results with the experimental results shows that the met...

Simulation of Dive Motion of a Deep Manned Submersible

作者：MALing; CUIWei-cheng 刊期：2004年第03期

In order to predict the dive motion of a deep manned submersible currently developed in China,a three-degree-of-freedom dynamic model is developed to simulate its dive motion restricted in the vertical plane. Being the nonlinear function of attack angle, the hydrodynamic forces acting upon the submersible are determi...

Powering Performance of a High-Speed Shallow-Water Craft

作者：HEShu-long; XINGSheng-de; HEChun-rong 刊期：2004年第03期

Hull form of a high-speed shallow-water craft used in fresh water is presented in this paper.Model tests for this hull lines are conducted at different water depth in towing tank, and the effect of shallow water on craft performance is investigated.Test resalts show that powering performance of this craft is superior...

Hydrodynamic Coefficients of Ships with Forward Speed in Shallow Waters

作者：M.HASANADIL; DUANWen-yang; WANGYu 刊期：2004年第03期

Effects of depth and forward speed on hydrodynamic coefficients of ships are presented in this paper. A modified simple Green function technique was used to calculate 2D coefficients while strip theory was used to calculate 3D coefficients. Numerical results are provided for hydrodynamic coefficients of parabolic hul...

Inspection Uncertainty and Model Uncertainty Updating for Ship Structures Subjected to Corrosion Deterioration

作者：LIDian-qing; ZHANGSheng-kun 刊期：2004年第03期

The classical probability theory cannot effectively quantify the parameter uncertainty in probability of detection.Furthermore,the conventional data analytic method and expert judgment method fail to handle the problem of model uncertainty updating with the information from nondestructive inspection.To overcome these...

Strain and stress triaxiality at a crack tip

作者：TIANChang-lu 刊期：2004年第03期

In view of the limitation of full plastic fields,the near tip triaxiality and detail elastic,plastic strain distributions derived from the analogy elastic plastic field (Tian and Gao, 2004) as well as FEM results of two kinds of specimens are presented.Both the analytical and numerical analyses indicate that the high...

Study of Residual Strength Index of Damaged Ship Hulls

作者：QIEn-rong; CUIWei-cheng; WANZheng-quan; QIUQiang 刊期：2004年第03期

This paper studies the effect of non-symmetric flood and rigidity loss of damaged ship hulls to external loads. Based on the calculation method of ultimate strength of damaged ship hulls under non-symmetric bending, the effect of collision, grounding and explosion damage on the ultimate strength of ship hull is also ...

Effect of a Local Reinforcement on the Stress Intensity Factor of a Cracked Plate

作者：JIANGCui-xiang; ZHA0Yao; LIUTu-guang 刊期：2004年第03期

Stress intensity factors are calculated for a cracked plate reinforced locally subject to mode I loading.The stiffeners are considered to have both longitudinal and transverse stiffness.There is no relative displacement between the plate and the stiffener.It is considered that the shear stresses are lumped at a finit...

Research of collision characteristics of bow structures of tanker

作者：JIANGHua-tao; GUYong-ning; HUZhi-qiang 刊期：2004年第03期

The damaeg of penetration of ship-side during a collision accident is strongly effected by stiffness and sharpness of bow structures of striking ship.The properties of ship bow structures are studied from the point of view of collision.By means of numerical simulation of a ship bow impacting to a rigid wall,the histo...

Finite Element Program Generator and Its Application in Engineering

作者：WANShui; HUHong; CHENJian-pin 刊期：2004年第03期

A completely new finite element software, Finite ElementProgram Generator (FEPG), is introduced and its designing thought and organizing structure is presented.FEPG uses the method of components and the technique of artificial intelligence to generate finite element program automatically by a computer according to th...

Fuzzy Control of Structural Vibration for Offshore Platforms

作者：ZHOUYa-jun; ZHAODe-you 刊期：2004年第03期

During the past three decades, fuzzy logic feedback control systems have been utilized for the suppression of structural vibration in numerous studies. With the main advantages of the fuzzy controller, the inherent robustness and ability to handle nonlinearity, uncertainty and imprecision of the structure, active str...

Study on Mathematical Models of Anti-shock Isolation System of a Marine Engine

作者：WANGYu; FENGQi; WANGQi-yue 刊期：2004年第03期

Exactly modeling of anti-shock isolation system of a marinein its design.For an isolation system with some rigid stops,the enginebody and isolators as springs and dampers,for which three nonlinearengine is an important stepcan be modeled as a rigidfactors exist.This paper isaimed at that whether there are any nonline...

《船舶力学》第二届编辑委员会名单

刊期：2004年第03期