دراسة الترددات الطبيعية و أشكال الأنماط المقابله لها لخزان اسطواني ذو مصطبات و ذو نهاية كروية

الملخص EN

The study of the natural frequencies and the corresponding mode shapes to the cylindrical tank is investigated by ANSYS program , which is built on the finite element method .

Three cases are studied , the first is when the tank without the longitudinal and circumferential stiffened , and the second is within the longitudinal and circumferential stiffens , and the third case is the tank with spherical end without stiffens .

The results show that the addition of the longitudinal and circumferential stiffens to the tank gave a decrease in the natural frequencies and the addition of semispherical end gave an increase in the natural frequencies, also the stresses in the walls of the tank is investigated in case of stiffened when the tank is filled with water to its quarter height.

The results are compared with the published results.

Good agreement is evident.