How to use the keyword "post increment" in .cnt file to change the result write frequency？

I try to change the result output frequency by using .cnt file during simulation. but it doesnot work.

I checked the.out file and found it said"change the post tape frequency:…". It seems that the CNT file does not work. How to use this keyword？

In volc it says 1-5rd as 1st input and 6-10rd as 2st input for 2nd datablock. of "post increment"，it should be 1-10rd as 1st input and 11-20rd as 2nd input

0 Kiranraj Shetty over 5 years ago

Did you try defining the output increment in Mentat as shown in attached image ?

In the dat file, 9th field of 2nd data block of POST card defines the output interval. Refer the attached images.

Regards,

Kiranraj Shetty

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OUTPUT_INTERVAL.zip
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0 denzel.li over 5 years ago

Thanks for reply, but I want to change the output increment during simulation.Is it can be done by using cnt file？
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0 Kiranraj Shetty over 5 years ago

Yes. It works. I tested a sample attached here. You can see in the message in out file

reading option : POST INCRE

       from file : E:\Rigid_Body_Contact_SD_Nonlinear\tip_load_job1.cnt

       write post tape every    200 increments.

As expected, initially the output is written for every increment, and after placing the cnt file from inc # 765 onwards it writes output for 200 increments.

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cnt_file_test.zip
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0 denzel.li over 5 years ago

Thanks very much.

I test the example and check my model and find this .cnt cannot be using at the begining of the simulation. only during the simulation processing, we can using this key word to change the result output frequency . If I start simution with a .cnt file, the output frequency won't change even .out file shows the program has read the .cnt file.

Another question:

This is the format of key word "POST INCREMENET", is it shoud be 1-10 and 11-20 for the two paramters? The example you gave also use 10 length for each paramter.

By the way, I have some problem in login the this community, it says my username or password is wrong but I can't change them and today I can login without change anything.
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0 Kiranraj Shetty over 5 years ago

The entries 1-5 and 6-10 indicates you have to enter the values for 1st entry within 1 to 5 characters and similarly the second entry should be entered within 6 to 10 characters. I have attached a screhshot which illustrrates this, I have added numbers 12345..... to show length of each field.

This is for single precision format. But in recent Mentat versions, dat file is written in extended precision. In this format,

Each field length is doubled.

There is also a free field format where each field can be separated by comma.

Further the second field is used to control how many times output should be written per loadcase and is should be used when you are not used the first one.

Regards,

Kiran

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0 denzel.li over 5 years ago

Thanks for explain, now everything is clear.
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