ERROR 1452
I was trying to run a modal analysis and this error occured. Can anyone help me with whats the error
Best Answer
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Adriano A. Koga_21884 said:
the .out file say 'material data'.
If your 'rho' is 0.0, then your mass = volume*density = volume*0.0 = 0.0
if we compare to a spring-mass system,:
f = sqrt(stiffness/mass)
>> if mass=0.0 >> ??
by the way, i suggest you to take some time and go through the Altair University trainings. Also take a look at the eBooks. They're nice for those who are starting at FE analysis.
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Altair EmployeeAnswers
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you have 2 cards that can be deleted.
the 2nd one has really strange things there.
Even deleting this, other errors will appear, such as your beam elements having wrong orientation.
Bear in mind thatfor beams you need to define a orientation vector, which indicated the corresponding local Y axis of your model.
The orientation is given by a projection of the orientation vector V along your beam axis (always local x).
the V vector CANNOT be aligned with your local X axis, otherwise it will throw an error.
Element 3408 has its 'V' vector aligned to the bar, thus an error message will be shown later.
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Hi Sir,
I deleted both the cards. As u said the orietation issue arived. Can you please guide me exactly like how can we set orientation vector for bam elements. Is it individually for each beam ellement or the complete mesh one orientation vector?
Thanking You
Amith
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Amith Anoop Kumar said:
Hi Sir,
I deleted both the cards. As u said the orietation issue arived. Can you please guide me exactly like how can we set orientation vector for bam elements. Is it individually for each beam ellement or the complete mesh one orientation vector?
Thanking You
Amith
1d>>bar>>update
select your element and define a new orientation vector (different than the current and not aligned with local X)
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Sir I changed the orientation of every element. Should it be done on every element or the shown element only?
And after that this error came
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Amith Anoop Kumar said:
Sir I changed the orientation of every element. Should it be done on every element or the shown element only?
And after that this error came
let me describe it clearly: orientation vector should be defined accordingly with your desired bar elements. If it is a circular/tube section, you don't need to worry so much with it, EXCEPT by avoinding orinetation aligned to the beam.
About ERROR # 24, I believe you understand what a modal analysis is: you need to provide the stiffness and MASS of your system in order to calculate your eigenvalues.
So the error clearly states that there's something missing about the mass of your model.
It clearly says "please check the material data". So, please, take a look at your material data, and check for the material density (RHO)
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Amith Anoop Kumar said:
the .out file say 'material data'.
If your 'rho' is 0.0, then your mass = volume*density = volume*0.0 = 0.0
if we compare to a spring-mass system,:
f = sqrt(stiffness/mass)
>> if mass=0.0 >> ??
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Adriano A. Koga_21884 said:
the .out file say 'material data'.
If your 'rho' is 0.0, then your mass = volume*density = volume*0.0 = 0.0
if we compare to a spring-mass system,:
f = sqrt(stiffness/mass)
>> if mass=0.0 >> ??
by the way, i suggest you to take some time and go through the Altair University trainings. Also take a look at the eBooks. They're nice for those who are starting at FE analysis.
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Thanks a lot for your sugestiion Sir. I thought that if we leave blank values like nu, rho it will have its default values . Anyways thanks a lot for taking your time Sir
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