Shelters are the structures used in military applications. Their function is to provide housing for different equipment serving different applications. Considering the applications, the structures need to be verified for their strength against different loading conditions. This evaluation can be well performed by FEA. FEA gives a better understanding of the actual behavior of shelter assembly under different operating conditions whether they are static or dynamic in nature. Some external excitations may lead to resonance conditions. This condition needs to be avoided by some design modifications. By virtue of modal analysis, FEA evaluates the structure for any such a condition.
Shelter manufacturer from India, well known for its work for INDIAN DEFENSE, approached ANALYZER to seek assistance in evaluating the design of their newly developed shelter assembly against different loading conditions.
The shelter assembly was analyzed using the Finite Element Method for different loading conditions. The FEA model is created by simplifying the components without compromising their strength & stiffness. The bolted, welded connections are modeled with appropriate assumptions & element types.
The results showed that the induced stresses are within the allowable limit for both static as well as dynamic loading conditions. Also, it does not possess any mode that will cause resonance. Hence the structure is predicted to behave safe during service life without any premature failure.