Re: [deal.II] postive definiteness of the stiffness matrix for a `floating' structure

2021-11-30 Thread Chen Shen
Dear Dr. Wolfgang, Thank you so much for the help! I really appreciated it. I will definitely check out what ASPECT does. Best, Chen On Monday, November 29, 2021 at 11:08:53 PM UTC-5 Wolfgang Bangerth wrote: > On 11/29/21 1:35 PM, Chen Shen wrote: > > > > I have a benchmark 2-D problem with

Re: [deal.II] postive definiteness of the stiffness matrix for a `floating' structure

2021-11-29 Thread Wolfgang Bangerth
On 11/29/21 1:35 PM, Chen Shen wrote: I have a benchmark 2-D problem with a square with linear elastic material under a uniform gravity in the horizontal direction.  No boundary condition is given to the structure.  I lumped the mass matrix so there is no solver involved in the problem. I exp