Research on the Influence of Reinforced Rib Thin-Walled Casing Structure Stiffness

Reinforced rib is used to strengthen the rigidity of thin-walled casing structure , inhibit the vibration of the structure effectively. In this paper, Finite Element Method is used to simulate the typical reinforced rib thin-walled casing structure. Changing the reinforced rib positions and geometric parameters such as sizes, then calculate the stiffness to weight ratio and dynamic response, at the same time ,make a comparison. The result shows that: The thin-walled case with reinforced rib, the tensile stiffness and bending stiffness were increased, but the stiffness to weight ratio is presented in different geometric parameters shows differents; Under the different frequencies of excitation force load, because of the reinforced rib, the thin-walled casing structures harmonic amplitude decreases when they are under the same frequency .The result will provide reference for later thin-walled case with reinforced rib structure design.