How can I apply Differential Quadrature method to solve a fourth order differential equation?

I am trying to solve the free vibration of a cantilever beam. I am attaching a word document in which I have given the progress of my work. I am not able to converge to fundamental frequency. I...

01 February 2015 2,269 28 View

How to decide upon the nature of grid points to be selected in Differential Quadrature method?

31 December 2014 9,033 4 View

How are the boundary conditions incorporated while using the Differential Quadrature method?

When dealing with 2-D Laplace equation how is Differential quadrature method applied to get the solution. How are the four boundary conditions incorporated into the formulation?

11 December 2014 910 12 View

What is numerical oscillation and what are the main cause of this phenomenon.?

I performed a Ritz analysis on 1-D Laplace equation and my results are diverging from the exact results. So is numerical oscillation is the only cause or can it be because of any other reason?

08 September 2014 3,538 6 View

Is there any standard procedure to get the weak form of a governing equation?

I basically need to know how to get the corresponding functional form for a differential equation.?My intention is to apply Ritz method to various structural problems.

07 August 2014 5,930 0 View

What is the significance of Laplace and Poisson equations in Mechanical Engineering?

Please help me with an example other than the heat transfer case. Also help me where exactly can we use Laplace or poisson 's equation.

06 July 2014 2,187 15 View

What is a thin-walled beam? What are their advantages compared to normal beams?

I know a thin walled beam is the one in which the length is one order more than other crossectional dimensions. Please explain why it is widely used over other beams?

06 July 2014 3,065 5 View

What is the difference between Rayleigh-Ritz method and Ritz method?

I know Ritz method is applied directly to the variational formulation. Basically what makes the Ritz method unique?

06 July 2014 6,234 10 View

Can someone help me to get the Paper authored by Walter Ritz in 1909 and 1908?

The paper is available in German but I couldn't find an English translation of the same. If possible please suggest me a link.

06 July 2014 8,810 0 View

Can some one help me out with the L operator of a linear differential equation?

Lu=d2u(x)/dx2. What is the meaning of this expression? The R.H.S is a second order derivative.

05 June 2014 3,483 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

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 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

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 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