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Time Dependent Distributed (Consistent) Mass Mstrix Calculation in FEM

Dear All

I am working on large deformation finite element analysis for my research work. To consider the self-weight I need to calculate the distributed (consistent) mass matrix. So my question that how calculate time (for static analysis time will be representing only load steps) dependent distributed mass matrix in new configurations. 

 

Any comment will be appreciated 

Thanks

Vasudeo Chaudhari  

Displacement Controlled Geometric Nonlinear FEM

Hi I am working on numerical simulation of petroleum pipeline subjected to
seismic hazards. I have developed Geo-Nonlinear FEM code for load
controlled which i have compered with Ansys and it is working fine.
now i would like to apply fault  displacement for this i need to
convert my code to displacement controlled using penalty approach
but it is not converging. i will be very happy if any one can suggest
how i can over come this problem or plz sugest me some book or papre. here I am using Newton-Raphson method 

 

thanking you

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