External pressure calculation problem
Thread Content
It is a device with a jacket; the pressure inside the cylinder is -0.1 MPa, while the pressure inside the jacket is 0.3 MPa. The cylinder body and the upper and lower end caps of the device all have jackets, but there is a section near the upper end cap that lacks a jacket. How should the length subject to external pressure be calculated in this case? The stress in this section is different from that in the other areas
The design parameters set by the poster are correct, right? Is the inner cylinder at -0.1? For determining the calculated length of the cylinder, refer to Figure 6-1 in GB150. The owner only needs to calculate the part with the jacket; by assuming equal thickness throughout, safety can be ensured.
The pressure difference acting on the outer cylinder is 2 kilograms per square inch! ! Stress concentration must be considered at the elbow! ! There are professional calculation software! !
The design pressure of the inner cylinder is -0.1 MPa
The comprehensive approach involves considering the jacket pressure to calculate the external pressure; in this case, the length over which the external pressure is calculated is determined based on the scenario with a jacket. Subsequently, an external pressure of -0.1 is applied to the entire inner cylinder, and for this purpose the length over which the external pressure is calculated is determined as if it were a vacuum vessel (this length should be greater than that in the case with a jacket), with the larger of the two values being taken.