Structural analysis of a tracked vehicle hull

The hull of a tracked military vehicle is complex in geometry and loading pattern. Analytical studies were carried out using numerically integrated elements for system analysis (NISA), a general finite element programme developed by the Engineering Mechanics Research Corporation (EMRC), USA. Structural changes in the initial design were made to bring deflection within acceptable limits. Dynamic stress levels for the hull structure were determined from strain gauge measurements. The resultant stresses were obtained adding the static and dynamic values. Finite element analysis was found to be very useful to check the rigidity of the structure at design stage and to suggest suitable modifications.