![]() ![]() ![]() From Earthquake-Resistant Design Concepts, FEMA P-749 / December 2010 Response modification factor “R” is the input users get wrong most often. This tower is designed to support IBC wind and seismic loads as programmed into Compress. ![]() Wind and seismic loads have not been added yet. Some sections are governed by the internal pressure design (Upper Cone and Lower Cone) and some by external pressure (Upper Section, Middle Shell and Lower Shell). Required thickness based on internal and external pressure only. Look for UG-28(c) calculations for the cylinders and UG-33(f) for the cones. Long shapes collapse easier than short shapes of the same section, and the code rules account for this. The external pressure calculations also use the diameter, thickness, and adds the use of the section length. In the sample calculation, look for the Appendix 1-1 calculations for the Cylinders and App 1-4(e) for the cones. Calculations are found in the ASME VIII-1 code book. Internal pressure calculations are based on diameter and thickness (+ angle for cones). For some of the sections internal pressure governs, for others external. Internal + External Pressure CalculationsĮach shell section is calculated for internal and external pressure loads. The extra time can easily pay off during construction. Solid modeling often takes more time than 2D CAD, but it also shows many design errors or issues in advance. Use of solid modeling is like building the vessel once in advance before it hits the shop floor. By default, we use SolidWorks to create vessel drawings. The report is longer than other programs, but often is easier to read and includes extensive references, and illustrates most of the calculation steps allowing the methods to be checked. Its extensive library of available calculation methods makes it useful for many vessel design tasks. Compress is the most commonly used program for tower design in our office. This vessel is calculated using the Compress pressure vessel code program by Codeware Inc. Waste Heat Recovery Shell and Tube Heat Exchangers For Gas Turbineĭrawing of the sample tower with combined external pressure, wind and seismic loads Compress.Thermal Design of Shell and Tube Heat Exchanger and Mean Metal Temperatures Calculation.Design Optimization with Pipe Stress Analysis.Screenshots of Pipe Stress Analysis In Action. ![]() Comparison Between Head Types: Hemi, SE, F&D and Flat.Tower with Wind, Seismic and Vacuum Loads.SolidWorks Simulation Validation (Blog).Sample – Seismic Analysis of a Propane Storage Sphere.Heat Exchanger FEA with Thermal Loads Sample.The Nuts and Bolts of Stress Linearization.How Permissible Cycle Life (or Fatigue Life) is Calculated using FEA. ![]()
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