Design a railway cistern for 120,000 kg of Liquid. It has to be a cylindrical shell on two supports. The cistern is 18 m long 3 m in diameter (inner). It is made of steel with the yield strength of SY= 240MPa. Safety factor of FY= 1.9; Total corrosion allowance, c= 3.0 mm; Welded joint efficiency = 0.85 Shell thickness, t - 32mm Check whether this thickness is sufficient to withstand combined action of the internal pressure, t he weight of liquid, and the action of longitudinal external forces (tensile or compressive) . Assume the mass of the train as m= 12 x 10^6kg, deceleration during braking of a = 3m/sec , and during climbing uphill assume the inclination angle of 10 degrees I assume there will be 3 design cases for this problem: Case 1 Internal Pressure+ Weight of Liquid Case 2Internal Pressure+ Weight of Liquid + Inertia during breaking of the railway cistern Case 3 Forces acting on the pressure vessel: Internal Pressure + Weight of liquid+ inertia of breaking + inclination angle (locomotive applied to the first cistern in the train) Wondering if I am going about this correctly?