User login


You are here

amceuma's blog

dispersive and nondispersive results!

Hi dear friends 

I am working about wave propagation modeling in solids. in FEM for 1D beam model when governed differential equation of motion is solving by central difference method the output results of displacement are nondispersive but by using MATLAB "lsim" command for simulation of LTI system for arbitrary inputs, the outputs are dispersive which we expect this phenomenon will be happen in beam like models!

in bar models both methods leads to nondispersive results which is resonable.

could you help me? 

RPIM for beam modeling as a 1-dimensional structure

Dear friends

I want to model a beam as a 1D structure using radial point interpolation meshfree method. there are expalnations in the chapter 10 of "meshfree method moving..." by Prof.Liu about PIM for beam modeling and not for RPIM. in PIM modelling we can consider 2*(number of nodes in support domain) terms of polynomials for extraction of moment matrix RQ because of the deflection and rotation dof in each node but it is not applicable for RPIM. what is the solution for overcomming to this problem?  could you help me about the shape function construction for this problem? 

numerical integration in meshfree method

Dear everybody

I am beginner in Meshfree method. I have some questions
in numerical integration in the weak form formulation. I would appreciate if
you help me.

In "meshless
methods in solid mechanics" written by chen et al, numerical
integration was summarized as: Nodal Integration, Background Mesh
and Wigner–Seitz Cell.

Subscribe to RSS - amceuma's blog

Recent comments

More comments


Subscribe to Syndicate