When calculating the nozzle load through finite element analysis, the selection of the length of the local model of the cylinder established
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This post was last edited by Freestyle-sky on 2017-6-28 11:10 In the design of static equipment, it is sometimes necessary to use the finite element method to calculate the nozzle load. What is the appropriate cylinder length to choose when establishing a local model? Many people choose the length of the cylinder from the head to be 2.5 (Rδ) 0.5 when building the model, but according to page 13 of JB4732: The local stress zone refers to the area where the extension distance in the meridian direction is not greater than 1.0(Rδ)0.5 and the stress intensity exceeds 1.1Sm, and the minimum distance between two adjacent local stress zones is required to be 2.5(Rδ)0.5. Under this understanding, does it need to establish a cylinder length greater than 1.0(Rδ)0.5+2.5(Rδ)0.5+1.0(Rδ)0.5=4.5(Rδ)0.5? (See picture below) Welcome everyone to discuss~
When entering the cylinder length, the software will remind you that the cylinder length is too short and needs to be corrected.