This is an ongoing research project under Dr. P.M. Singru (Asst. Prof. and Group Leader, Mechanical department- Bits-Pilani Goa campus). This is registered as a Final Year Undergraduate Special Project.
In order to reduce weight or improve certain properties, perforated structures have been adopted in many engineering designs. Perforated plates and shells are two structural elements widely used in practice. Despite the similarity in their shapes, the mechanical behaviors of perforated components are drastically different from those of non-perforated components. Therefore, it is worthwhile investigating the vibration behavior of perforated structures.
This project is catagorised into two parts:
a) Experimental Analysis of Perforated Plates:
It deals with the modal vibrational analysis of rectangular perforated plates with square and triangular penetration patterns. The natural frequencies, normal modes and mode shapes are to be obtained by experimental methods. This will be done for two different configurations:
· Keeping hole diameter constant (10 mm) and varying the ligament efficiencies (0.2 to 0.6).
· Keeping ligament efficiency constant and varying the hole diameter.
In addition, an empirical relation will be obtained relating parameters like hole diameter and ligament efficiencies for square and triangular penetration patterns.
b) FE Analysis of Perforated Plates:
Finite element analyses using the commercial computer code ANSYS will be performed to verify the analytical results for the theoretical study. The experimental results provide the response of the realistic conditions and hence help the numerical model become more complete and persuasive.
(The results will be uploaded upon progress)
