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March 18, 2024 at 7:04 amnhanani4Subscriber
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Hi,
I do the simulation ansys aqwa and get this error "Hydrodynamic interacting structure move too far from analysis position movement".
Can give suggecting how I can solve this error?
I already try decrease / increase but it still give this error.
I do two other simulation likewise change the width and length structure but still get this error. Can I know why ? Maybe ansys version 2023 R2 is not suitable for my simulation?
Can somebody help me..tq in advance.
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March 20, 2024 at 9:33 amShuangxing DuAnsys Employee
Hydrodynamic interactions between different floating structures are sensitive to the relative positions/orietations between the structures in the hydrodynamic interaction group. Â
Are there any mechanism, such as fenders/mooring liners/joints between the structures, to avoid them to collide or to move far away from each other in the model you are studying?
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April 24, 2024 at 5:59 amnhanani4Subscriber
i have hinged joint and fender ..
the pic old i use caternory mooring.the latest i use tether mooring.
if i use structure selection in hydrodynamic diffraction as NONE the simulation can run in hydrodynamic time response ..
but if i select ALL structure selection, the simulation cannot run in hydrodynamic time response and get this error.
my simulation is multibody should choose none or all in structure selection ?
hope u can help me .
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April 24, 2024 at 8:33 am
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April 25, 2024 at 9:58 am
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April 25, 2024 at 12:01 pmShuangxing DuAnsys Employee
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The structures’ orders have no effect on this issue if they are in a hydrodynamic interation structure group. From the error message, the simulation stopped as TIME=0.0, I guess that your joint definition may not be correct, which may connect the wrong structures together.
Please use (your Ansys installation folder)\aqwa\bin\winx64\ags.exe to open your Aqwa model (in your project\TimeResponse.res), which may help you to check the connections between the structures. For example, the structure sequence numbers and the articulation sequence numbers can be displayed in Ags as shown below
You can also display the Hydrodynamic Diffraction model (in your project/ANALYSIS.RES) by ags.exe to check if the relative locations of the structures in HD analysis and HR analysis are the same.
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May 5, 2024 at 9:13 amnhanani4Subscriber
I already check using ansys aqwa gs.Â
I have few question.
I want to put hinge connector at multi floating structure.It is right the point coordinate that I put exactly side of module?
It look okay for me at workbench. but at ansys aqwa gs only see 1 side connector. the connector look inside the module. I want the connector only located between two module. How to make the hinged connector put between two module? It look no gap connector.
If I put connector, the mooring attract more to right side before simulation run. What is the problem?
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May 7, 2024 at 8:51 am
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May 7, 2024 at 12:01 pmnhanani4Subscriber
yes the hinge at x-direction. The hinge gap is 3m. How can I do the gap in ansys aqwa?
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May 7, 2024 at 4:24 pmShuangxing DuAnsys Employee
Define the connection points at the middle of the gap.
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May 7, 2024 at 5:59 pm
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May 7, 2024 at 6:05 pmnhanani4Subscriber
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May 8, 2024 at 7:55 amShuangxing DuAnsys Employee
From Aqwa theory manual, the fender's compression force is calculated by
K1 ~ K5 could be input as Coefficient A ~ Coefficient E. As you only have the linear stiffness value, it could be input as Coefficient A.
Please also see the definition of fender's damping force
the unit of the damping coefficient is in second.
Please check the hinge axices in your model, the hinge local x-axis (in red color below) may not be correct.
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May 10, 2024 at 2:36 am
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May 10, 2024 at 7:45 am
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May 12, 2024 at 2:33 pmnhanani4Subscriber
Sorry for my mistake. I see the wrong simulation.
For the linear arrangement module, I get can run the simulation already. Thank u for helping me.
That simulation that I got wrong is the other arrangement module tandem module. The simulation that can not run. I need to change the position hinged at the x-axis but I do not know how.
where i should change the key in data? In a the data only... I should change data in b,c,d?
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- The topic ‘ansys aqwa error structure move to far’ is closed to new replies.
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