from:"Ramprasad R"

Re: [deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

2019-07-25 Thread Ramprasad R

Hello all,

I would like to know if I can use one name space (step-x) in another name 
space (step-y). So that I can couple the 2 or more steps. 

Thank you.

On Wednesday, June 26, 2019 at 11:30:21 AM UTC+2, Ramprasad R wrote:
>
> Hi Daniel,
>
> Thank you so much for your detailed Explanation. As you said earlier, I 
> have to do the eigen value analysis.  You explanation has given me an 
> approach to start with. I can not thank you enough.
>
> Warm regards
>
> Ramprasad
>
> On Tue, Jun 25, 2019 at 6:27 PM Daniel Garcia-Sanchez <
> danielgarsanc...@gmail.com> wrote:
>
>>
>>
>> On Monday, June 24, 2019 at 11:36:32 PM UTC+2, Ramprasad R wrote:
>>>
>>> Hello Bangerth,
>>>
>>> The terms N_* are the resultant forces in the * direction and these 
>>> forces are calculated using the strains which in turn are calculated using 
>>> the displacements u. So the terms N_* are not constants, rather change with 
>>> each element. And these values directly depend on u.
>>>
>>>
>>>>
>> Hi Ramprasad,
>>
>> I think that you want to do an eigenvalue calculation (step-36)
>>
>> I think that first you have to do an static calculation before your 
>> eigenvalue calculation in order to obtain the values for N_* (step-8)
>>
>> As discussed in your paper, the typical eigenvalue problem for the 
>> elastic equation takes this form, where omega^2 is your eigenvalue and Phi 
>> the eigenvector
>> (K - omega^2 M)*Phi = 0
>>
>> For the buckling case lambda is your eigenvalue.
>> (K - lambda G)*Phi = 0
>>
>> The calculation of K can be found in step-8, step-62 (or other tutorials).
>>
>> I think that in order to calculate G you need the resulting strain of an 
>> static calculation. You can do the static calculation, store the strain in 
>> a temporary buffer and use that data to calculate G. step-18 shows you how 
>> to do this.
>>
>> Once you have K and G, you can do an eigenvalue calculation. step-36 
>> shows you how to do an eigenvalue calculation. Note that in step36 the 
>> stiffness matrix is called A.
>>
>> The equation in step36 is 
>> (D-epsilon M)*Phi=0
>> which is very similar to the buckling equation. 
>>
>> Best,
>> Daniel 
>>
>> -- 
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>>
>

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Re: [deal.II] Re: Compatibility of Petsc with step 18

2019-07-19 Thread Ramprasad R

Hi Daniel,
The problem is now solved. The issue was that, the bash rc did not have the
location of PETSc. This line in the bash file solved the problem "export
PETSC_DIR=/path/to/petsc-x-y-z""

Regards,
Ramprasad

On Wed, Jul 17, 2019 at 5:31 PM Bruno Turcksin 
wrote:

> Ramprasad,
>
> Le mer. 17 juil. 2019 à 11:24, Ramprasad R
>  a écrit :
> > Yes I did recompile it. The details of the config files are in the
> attachment.
> There is something strange in you installation: detailed.log says that
> you are using PETSc but config.h says that you are not. It looks like
> you compiled deal.II without PETSc and then in the same directory
> recompiled deal.II with PETSc supports. This can cause the strange
> behavior that you are seeing. Remove your build directory and
> reinstall deal.II from scratch.
>
> Best,
>
> Bruno
>
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Re: [deal.II] Re: Compatibility of Petsc with step 18

2019-07-17 Thread Ramprasad R

Hello,
Yes I did recompile it. The details of the config files are in the
attachment.
Regards,
Ramprasad Raghunath

On Wed, Jul 17, 2019 at 2:14 PM Daniel Arndt  wrote:

> Ramprasad,
>
> Did you also recompile, i.e. run 'make', afterwards? Can you also show us
> the file 'detailed.log' in your build directory and the the file
> 'base/config.h' in your installation directory?
>
> Best,
> Daniel
>
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###
#
#  deal.II configuration:
#CMAKE_BUILD_TYPE:   DebugRelease
#BUILD_SHARED_LIBS:  ON
#CMAKE_INSTALL_PREFIX:   /home/ramprasad/Documents/Studienarbeit/bin
#CMAKE_SOURCE_DIR:   /home/ramprasad/Documents/Studienarbeit/dealii-9.0.1
#(version 9.0.1)
#CMAKE_BINARY_DIR:   /home/ramprasad/Documents/Studienarbeit/build
#CMAKE_CXX_COMPILER: GNU 7.4.0 on platform Linux x86_64
#/usr/bin/c++
#CMAKE_C_COMPILER:   /usr/bin/cc
#CMAKE_Fortran_COMPILER: /usr/bin/gfortran
#CMAKE_GENERATOR:Unix Makefiles
#
#  Base configuration (prior to feature configuration):
#DEAL_II_CXX_FLAGS:-pedantic -fPIC -Wall -Wextra -Wpointer-arith -Wwrite-strings -Wsynth -Wsign-compare -Wswitch -Woverloaded-virtual -Wno-placement-new -Wno-deprecated-declarations -Wno-literal-suffix -fopenmp-simd -std=c++17
#DEAL_II_CXX_FLAGS_RELEASE:-O2 -funroll-loops -funroll-all-loops -fstrict-aliasing -Wno-unused-local-typedefs
#DEAL_II_CXX_FLAGS_DEBUG:  -Og -ggdb -Wa,--compress-debug-sections
#DEAL_II_LINKER_FLAGS: -Wl,--as-needed -rdynamic
#DEAL_II_LINKER_FLAGS_RELEASE: 
#DEAL_II_LINKER_FLAGS_DEBUG:   -ggdb
#DEAL_II_DEFINITIONS:  
#DEAL_II_DEFINITIONS_RELEASE:  
#DEAL_II_DEFINITIONS_DEBUG:DEBUG
#DEAL_II_USER_DEFINITIONS: 
#DEAL_II_USER_DEFINITIONS_REL: 
#DEAL_II_USER_DEFINITIONS_DEB: DEBUG
#DEAL_II_INCLUDE_DIRS  
#DEAL_II_USER_INCLUDE_DIRS:
#DEAL_II_BUNDLED_INCLUDE_DIRS: 
#DEAL_II_LIBRARIES:m
#DEAL_II_LIBRARIES_RELEASE:
#DEAL_II_LIBRARIES_DEBUG:  
#DEAL_II_COMPILER_VECTORIZATION_LEVEL: 1
#
#  Configured Features (DEAL_II_ALLOW_BUNDLED = ON, DEAL_II_ALLOW_AUTODETECTION = ON):
#  ( DEAL_II_WITH_64BIT_INDICES = OFF )
#  ( DEAL_II_WITH_ADOLC = OFF )
#DEAL_II_WITH_ARPACK set up with external dependencies
#ARPACK_LINKER_FLAGS = 
#ARPACK_LIBRARIES = /usr/lib/x86_64-linux-gnu/libparpack.so;/usr/lib/x86_64-linux-gnu/libarpack.so;/usr/lib/x86_64-linux-gnu/liblapack.so;/usr/lib/x86_64-linux-gnu/libf77blas.so;/usr/lib/x86_64-linux-gnu/libatlas.so;gfortran;quadmath;m;c;gcc_s;gcc;/usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi.so
#  ( DEAL_II_WITH_ASSIMP = OFF )
#DEAL_II_WITH_BOOST set up with external dependencies
#BOOST_VERSION = 1.65.1
#BOOST_CXX_FLAGS = -Wno-unused-local-typedefs
#BOOST_DEFINITIONS = BOOST_NO_AUTO_PTR
#BOOST_USER_DEFINITIONS = BOOST_NO_AUTO_PTR
#BOOST_INCLUDE_DIRS = /usr/include
#BOOST_USER_INCLUDE_DIRS = /usr/include
#BOOST_LIBRARIES = /usr/lib/x86_64-linux-gnu/libboost_iostreams.so;/usr/lib/x86_64-linux-gnu/libboost_serialization.so;/usr/lib/x86_64-linux-gnu/libboost_system.so;/usr/lib/x86_64-linux-gnu/libboost_thread.so;/usr/lib/x86_64-linux-gnu/libboost_regex.so;/usr/lib/x86_64-linux-gnu/libboost_chrono.so;/usr/lib/x86_64-linux-gnu/libboost_date_time.so;/usr/lib/x86_64-linux-gnu/libboost_atomic.so;pthread
#  ( DEAL_II_WITH_CUDA = OFF )
#

Re: [deal.II] Re: Compatibility of Petsc with step 18

2019-07-17 Thread Ramprasad R

Hello Bruno,
Yes I have used the option -DDEAL_II_WITH_PETSC=ON. and I have also used
the command to specify the location of petsc.
"-DPETSC_DIR=/home/ramprasad/petsc-3.10.5". The error still pertains.

Thank you.

Regards,
Ramprasad

On Tue, Jul 16, 2019 at 9:13 PM Bruno Turcksin 
wrote:

> Ramprasad,
>
> On Tuesday, July 16, 2019 at 11:51:00 AM UTC-4, Ramprasad R wrote:
>>
>> The version of deal.ii is 9.0.1 and the version of PETSc is 3.10.5. I
>> also changed the config file of deal.ii to have MPI PETSc on.
>>
> What do you mean by "I changed the config file of deal.II"? You should not
> change any file generated by deal.II. When you compiled deal.II, did you
> use the option -DDEAL_II_WITH_PETSC=ON? If not, deal.II was not compiled
> with PETSc supports.
>
> Best,
>
> Bruno
>
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Re: [deal.II] Re: Compatibility of Petsc with step 18

2019-07-16 Thread Ramprasad R

Dear Daniel,
The version of deal.ii is 9.0.1 and the version of PETSc is 3.10.5. I also
changed the config file of deal.ii to have MPI PETSc on.

Thank you.

Best regards,
Ramprasad

On Tue, Jul 16, 2019 at 5:12 PM Daniel Arndt  wrote:

> Ramprasad,
>
> Let's first rule out some simple problems. Which version of deal.II are
> you using? Did you compile deal.II with MPI and PETSc support?
> We only define the namecpacePETScWrappers when DEAL_II_WITH_PETSC=ON. Can
> you provide us with the content of the detailed.log file in your build
> directory?
>
> Best,
> Daniel
>
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[deal.II] Compatibility of Petsc with step 18

2019-07-16 Thread Ramprasad R

Hello All,

I am getting an error when I try to compile the step-18. It states 
"PETScWrappers does not name a type". I wanted to know if anyone else has 
faced the same problem. And if there is a solution to this.

Thank you. 

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Re: [deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

2019-06-26 Thread Ramprasad R

Hi Daniel,

Thank you so much for your detailed Explanation. As you said earlier, I
have to do the eigen value analysis.  You explanation has given me an
approach to start with. I can not thank you enough.

Warm regards

Ramprasad

On Tue, Jun 25, 2019 at 6:27 PM Daniel Garcia-Sanchez <
danielgarsanc...@gmail.com> wrote:

>
>
> On Monday, June 24, 2019 at 11:36:32 PM UTC+2, Ramprasad R wrote:
>>
>> Hello Bangerth,
>>
>> The terms N_* are the resultant forces in the * direction and these
>> forces are calculated using the strains which in turn are calculated using
>> the displacements u. So the terms N_* are not constants, rather change with
>> each element. And these values directly depend on u.
>>
>>
>>>
> Hi Ramprasad,
>
> I think that you want to do an eigenvalue calculation (step-36)
>
> I think that first you have to do an static calculation before your
> eigenvalue calculation in order to obtain the values for N_* (step-8)
>
> As discussed in your paper, the typical eigenvalue problem for the elastic
> equation takes this form, where omega^2 is your eigenvalue and Phi the
> eigenvector
> (K - omega^2 M)*Phi = 0
>
> For the buckling case lambda is your eigenvalue.
> (K - lambda G)*Phi = 0
>
> The calculation of K can be found in step-8, step-62 (or other tutorials).
>
> I think that in order to calculate G you need the resulting strain of an
> static calculation. You can do the static calculation, store the strain in
> a temporary buffer and use that data to calculate G. step-18 shows you how
> to do this.
>
> Once you have K and G, you can do an eigenvalue calculation. step-36 shows
> you how to do an eigenvalue calculation. Note that in step36 the stiffness
> matrix is called A.
>
> The equation in step36 is
> (D-epsilon M)*Phi=0
> which is very similar to the buckling equation.
>
> Best,
> Daniel
>
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Re: [deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

2019-06-24 Thread Ramprasad R

Hello Bangerth,

The terms N_* are the resultant forces in the * direction and these forces
are calculated using the strains which in turn are calculated using the
displacements u. So the terms N_* are not constants, rather change with
each element. And these values directly depend on u.

Thank you.

Regards,
Ramprasad

On Mon, Jun 24, 2019 at 10:56 PM Wolfgang Bangerth 
wrote:

> On 6/24/19 9:24 AM, Ramprasad R wrote:
> >
> > The following image has the exact formulation of the geometric stiffness
> > matrix. Which is denoted by G in the image.
>
> Ramprasad,
> I don't think I quite understand the connection step-60. In the context
> of that problem, for which of the two variables (u and lambda) do you
> want to compute that matrix? Assuming you mean that it is supposed to be
> for u, it is not difficult to write down what you need to do based on
> what you already learn in step-3 or step-4, for example. In fact, these
> two early programs already implement the first two terms of G_ij if you
> assume that N_x=N_y=N_xy=1.
>
> I am not familiar with the terms used in the page you show. Are the N_*
> factors constants? Are they functions of space?
>
> Best
>   W.
>
>
> --
> 
> Wolfgang Bangerth  email: bange...@colostate.edu
> www: http://www.math.colostate.edu/~bangerth/
>
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[deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

2019-06-22 Thread Ramprasad R

Dear Sir/Madam,

I am a student in Technical University of Braunschweig, Germany. I am
trying to work on a project for the aerospace department of my university.
In this project I am trying to extend the step 60 tutorial into buckling
analysis. I am trying to find a function to calculate the geometric
stiffness matrix. It would be of great help if I could find some help
regarding this issue.

Hoping to hear from you soon.

Thank you.

Best regards,

Ramprasad Raghunath

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Re: [deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

Re: [deal.II] Re: Compatibility of Petsc with step 18

Re: [deal.II] Re: Compatibility of Petsc with step 18

Re: [deal.II] Re: Compatibility of Petsc with step 18

Re: [deal.II] Re: Compatibility of Petsc with step 18

[deal.II] Compatibility of Petsc with step 18

Re: [deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

Re: [deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

[deal.II] Fwd: Regarding Step 60 tutorial of deal.ii

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