What are the advantages and disadvantages of analytical and semianalytical methods over numerical methods like FEM and FDM?

What are the advantages and disadvantages of analytical and semi-analytical methods over numerical methods like FEM and FDM? I am looking for detailed advantages and disadvantages.

31 December 2018 7,984 3 View

Could anyone suggests some experimental researches (results) of free vibrations of laminated composite plates fully covered with piezoelectric layers?

Could anyone suggests some experimental researches (results) of free vibrations of laminated rectangular composite plates fully covered with piezoelectric layers?

07 August 2018 4,784 2 View

Do external voltages exerted on electrodes of piezo-layer affect the natural frequencies, or they play the role of external load?

Consider a single piezoelectric layer (plate), polarized in its thickness direction and a top and bottom electrodes with nonzero external voltages exerted on them. Do this external voltages affect...

05 June 2018 4,918 4 View

Frequency inconsistencies in rectangular composite plate?

04 May 2018 2,929 0 View

Could some body explain what the thickness mode frequencies are in a piezoelectric plate?

I have analysed free vibration of square piezoelectric plate layer with Ansys. (0.1m ,0.1m ,0.01m) I am looking for thickness mode frequencies, but dont know which of them are. Could somebody...

09 October 2017 5,556 0 View

Could Rayleigh-Ritz method be used for vibration analysis of Forced vibrations?

Could Rayleigh-Ritz method be used for vibration analysis of Forced vibrations? For example in forced vibration of a plate under general time varying loads.

09 October 2017 8,028 3 View

What is the value of shear correction factor for (piezo)composite plates?

08 September 2017 4,514 3 View

How to find close form inverse of a large symbolic matrix in Matlab?

I have a big 1000*1000 symbolic matrix (some of its diagonal entries are function of x variable), is there a trick way to calculate closed form inverse of a such matrices in Matlab or Maple?

08 September 2017 4,307 4 View

Is there any commercial FEM software package that has shell elements to model piezoelectric materials?

08 September 2017 1,478 4 View

How to implement short circuit and open circuit B.C on a piezoelectric patch in ANSYS?

I want to analyse the free vibration of a piezoelectric patch at open and short circuited condition in ANSYS. Do you know how to implement short circuit and open circuit B.C on a piezoelectric...

06 July 2017 5,682 1 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View