Functional Relationships: Difference between revisions
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[[de:Funktionelle Abhängigkeiten]] | [[de:Funktionelle Abhängigkeiten]] | ||
The parameters for the water level and current variations caused by a moving ship are a function of: | The parameters for the [[water level]] and current variations caused by a moving ship are a function of: | ||
* ship velocity '''v<sub>S</sub>''' and the passing distance '''L''' | * ship velocity '''v<sub>S</sub>''' and the passing distance '''L''' | ||
* ship dimensions (length '''l''', width '''b''', draught '''t''', submerged midship cross-section '''A<sub>S</sub>''') | * ship dimensions (length '''l''', width '''b''', [[draught]] '''t''', submerged midship [[cross-section]] '''A<sub>S</sub>''') | ||
* total hydrodynamic resistance of the ship (ship form) in the canal '''R<sub>T,K</sub>''' | * total hydrodynamic resistance of the ship (ship form) in the canal '''R<sub>T,K</sub>''' | ||
* waterway conditions (water level '''B''' and bed width '''B<sub>S</sub>''', water depth '''d''', cross-section and area '''A''', bank profile and slope '''1 : m''') | * [[waterway]] conditions ([[water level]] '''B''' and bed width '''B<sub>S</sub>''', [[water depth]] '''d''', [[cross-section]] and area '''A''', [[bank]] profile and slope '''1 : m''') | ||
* current conditions in the waterway | * current conditions in the [[waterway]] | ||
* other influences such as waterway bend, type of propulsion, water density. | * other influences such as [[waterway]] bend, type of propulsion, water density. | ||
<br /> | <br /> | ||
The ''essential'' parameters for the ship induced loading for fairways have been shown to be: | The ''essential'' parameters for the ship induced loading for fairways have been shown to be: | ||
* the ship velocity ('''v<sub>S</sub>''') | * the ship velocity ('''v<sub>S</sub>''') | ||
* the passing distance ('''L''') to the bank edge which defines the hydraulic partial cross-section ('''A<sub>T</sub>''') | * the passing distance ('''L''') to the [[bank]] edge which defines the hydraulic partial [[cross-section]] ('''A<sub>T</sub>''') | ||
* the water depth to draught ratio ('''d/t'''), and the cross-section ratio '''A<sub>T</sub> / 0,5 A<sub>S</sub>'''. | * the [[water depth]] to [[draught]] ratio ('''d/t'''), and the [[cross-section]] ratio '''A<sub>T</sub> / 0,5 A<sub>S</sub>'''. | ||
To illustrate more simply the physical processes occurring when a ship is moving in a waterway of varying non-uniform cross-section, one may think of the waterway cross-section as being divided into two parts '''A<sub>T1</sub>''' and '''A<sub>T2</sub>''', through each of which half of the ship's displacement passes. Thus each bank experiences a qualitatively different ship induced loading as is determined by the partial cross-section ratios '''A<sub>T1</sub> / 0,5 A<sub>S</sub>''' and '''A<sub>T2</sub> / 0,5 A<sub>S</sub>'''. | To illustrate more simply the physical processes occurring when a ship is moving in a [[waterway]] of varying non-uniform [[cross-section]], one may think of the [[waterway]] [[cross-section]] as being divided into two parts '''A<sub>T1</sub>''' and '''A<sub>T2</sub>''', through each of which half of the ship's displacement passes. Thus each [[bank]] experiences a qualitatively different ship induced loading as is determined by the partial [[cross-section]] ratios '''A<sub>T1</sub> / 0,5 A<sub>S</sub>''' and '''A<sub>T2</sub> / 0,5 A<sub>S</sub>'''. | ||
<br /> | <br /> | ||
Latest revision as of 09:32, 21 October 2022
The parameters for the water level and current variations caused by a moving ship are a function of:
- ship velocity vS and the passing distance L
- ship dimensions (length l, width b, draught t, submerged midship cross-section AS)
- total hydrodynamic resistance of the ship (ship form) in the canal RT,K
- waterway conditions (water level B and bed width BS, water depth d, cross-section and area A, bank profile and slope 1 : m)
- current conditions in the waterway
- other influences such as waterway bend, type of propulsion, water density.
The essential parameters for the ship induced loading for fairways have been shown to be:
- the ship velocity (vS)
- the passing distance (L) to the bank edge which defines the hydraulic partial cross-section (AT)
- the water depth to draught ratio (d/t), and the cross-section ratio AT / 0,5 AS.
To illustrate more simply the physical processes occurring when a ship is moving in a waterway of varying non-uniform cross-section, one may think of the waterway cross-section as being divided into two parts AT1 and AT2, through each of which half of the ship's displacement passes. Thus each bank experiences a qualitatively different ship induced loading as is determined by the partial cross-section ratios AT1 / 0,5 AS and AT2 / 0,5 AS.
back to Ship-generated Loading