As per the applications, industrial equipment is subjected to different types of loading. In some cases, the structures are subjected to vibrations. These forced vibrations may be sinusoidal or random in nature depending upon the functional requirements. If this external excitation frequency matches with one of the natural frequencies of the structure then resonance will occur & structure vibrates with maximum amplitude. The condition of resonance should be avoided in order to avoid its harmful effects on the structure (In most of cases this condition leads to structural failure). Modal analysis is performed in order to study different natural frequencies & their corresponding mode shapes.
Process equipment manufacturer from India & Abroad approached ANALYZER to seek assistance in evaluating the design of their newly developed equipment against forced vibrations & provide the solution in case of any observed resonance.
The structure was analyzed using Finite Element Method for Modal Analysis. The modal analysis is performed for the structure without any loading as we are evaluating a characteristic property of the structure. While creating FEA model, care had been taken in order to keep the structural stiffness unaffected.
The results showed that the natural frequencies of the structure are away from external excitation frequency by sufficient margin. Hence the structure does not exhibit any resonance during it service life & may sustain the external excitation as a rigid body.