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The Two-dimensional Study of the Interaction between Liquid loshing and Elastic Structures
Liquid sloshing Fluent Deformation Numerical simulation
2011/9/9
Sloshing phenomenon in the liquid cargo carriers has caught the attention of researchers as the interaction between the sloshing waves and structure is one of the key point and difficulty in the study...
Unstructured Grid Immersed Boundary Method for Numerical Simulation of Fluid Structure Interaction
fluid structure interaction immersed boundary method VOS unstructured grids finite volume method
2011/9/9
This paper presents an improved unstructured grid immersed boundary method. The advantages of both immersed boundary method and body fitted grids which are generated by unstructured grid technology ar...
温度对海底沉积物声学特性影响实验研究
海底沉积物 声速 声衰减 温度
2012/3/9
温度的变化是影响海底沉积物声学特性非常重要的因素之一。文章采用同轴差距衰减测量法, 在不同温度下对海底沉积物声学特性进行测量, 实验得出南海海底沉积物随着温度的升高具有以下声学特性: 1)沉积物声速变化比较缓慢, 上下波动点较明显, 但总体趋势接近线性下降; 2)衰减幅值随着温度升高一直下降, 偶尔有些波动的异常点, 声衰减幅值呈现线性下降的趋势; 3)声衰减系数变化呈现抛物线趋势, 具有强非线性...
Feedback effects in a coastal canopy-forming submersed plant bed
coastal canopy-forming submersed plant bed Feedback
2014/4/17
Although physical and biogeochemical properties of an environment determine distribution and health of
biota, some organisms modify habitat conditions through complex interactions with their surround...
Photodegradation of the brevetoxin PbTx-2 in coastal seawater
brevetoxin PbTx-2 coastal seawater
2014/4/17
The photodegradation rate of the brevetoxin analog PbTx-2 was investigated in a variety of natural water
matrices. The observed first-order photodegradation rate coefficient of the logarithmic-transf...
We examined the dispersal of larvae (glochidia) of a common unionid mussel species, Actinonaias ligamentina,
which need to attach to a host fish in order to develop into juveniles, in a lowland river...
在工作原理、技术参数、采集软件和处理软件功能与操作, 以及数据实测等方面对相干声纳多波束测深系统Geoswath Plus 和传统型多波束测深系统Seabeam 1180 进行了详细对比。对比表明, 两套多波束系统的工作原理完全不同; 传统型多波束测深系统在探头下方数据密集, 两侧的数据逐渐变稀, 相干声纳多波束测深系统在探头正下方的数据比较稀疏, 探头两侧的数据较密集; 相干声纳多波束测深系统G...
Numerical and Dimensional Analysis for Prediction of Line Heating Residual Deformations
dimensional analysis 3-D finite element analysis elasto-plastic analysis residual deformations multiple regression analysis oxy-acetylene gas flame
2011/9/8
Line heating process is a very complex phenomenon as a variety of factors affects the amount of residual deformations. Numerical thermal and mechanical analysis of line heating for prediction of resid...
Power Flow Calculation Method of Large Shipboard Power System
power flow method node voltage method asynchronous motor transformer
2011/9/9
The effect of line voltage drop is considered larger on loads, especially on asynchronous motor, transformers and other non-linear load parameters in power system of large ships. A novel power flow me...
Mooring Truncation Design of a Deepwater SPAR
SPAR mooring system truncation global response
2011/9/9
To solve the dimensional limitations of physical models in tests, an equivalent water depth truncated design for a classical SPAR working in 913 m water was investigated. The water depth was reduced t...
Using a Time-domain Higher-order Boundary Element Method to Simulate Wave and Current Diffraction from a 3-D Body
wave-current diffraction time-domain simulation drift force higher-order boundary element method
2011/9/9
To study wave-current actions on 3-D bodies a time-domain numerical model was established using a higher-order boundary element method (HOBEM). By assuming small flow velocities, the velocity potentia...
Investigation of a Design Modification for Double Helical Gears Reducing Vibration and Noise
tooth profile modification tooth longitudinal modification double helical gears loaded transmission error
2011/9/9
To reduce vibration and noise and increase transmission efficiency, a three segment method for modifying the pinion profile was proposed. Cutter surface equations were deduced by changing the shape of...
Numerical Simulation of Dam Breaking Using Smoothed Particle Hydrodynamics and Viscosity Behavior
meshless method smoothed particle hydrodynamics (SPH) dam breaking free surface flow
2011/9/9
Smoothed particle hydrodynamics (SPH) is a Lagrangian meshless particle method. It is one of the best method for simulating violent free surface flows in fluids and solving large fluid deformations. D...
Testing an improved cymbal hydrophone
cymbal hydrophone sensitivity resonance frequency parallel connection frequency band
2011/9/13
Cymbal hydrophones have small volume and high sensitivity, but their reception is not stable enough, and their reception is in too narrow a frequency band. In order to overcome these inadequacies, the...
A method for testing drag-reduction on riblet surfaces based on the Spalding formula
Spalding formula riblet surface drag-reduction testing
2011/9/13
This paper presents a method based on the Spalding formula for testing drag-reduction on riblet surfaces. Its advantage lies in that it is more convenient and yields more precise data compared with te...