## Category Archives: FEM – Analysis

## Fastener modelling in Nastran

This way of modelling presented in this post is one of most used, as it is simple and sufficiently accurate. For the fastener modelling generally is used a Spring type element (CBUSH), and it should be done as Mesh-indipendent, like a … Continue reading

## Linear Buckling Analysis – SOL 105

Theoretical Background Buckling analysis assesses the stability characteristics dictating the integrity limit of a structure. Let us start with a linear equation of motion for a preloaded structure: where M,C, K and Kd are mass, viscous damping, material and differential stiffness … Continue reading

## Problems with Large XDB or OP2

If you are constantly having to work with large models and larger output in XDB format, MSC Nastran has come out with a good solution. A common fatal message encoutered while writting out large size xdb files is UFM 6062(DBC). … Continue reading