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Recent content by cougaggie
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Nozzle Loads for Seismic Analysis
Section VIII, Div 2 (sorry). This issue is some reviewers say that nozzle loads are only locally acting, and one does not need to conider the resultant sum of all nozzle laods when analyzing the supports. Others say you do. Seems to me like you have to include the resultant sum all acting in...- cougaggie
- Post #3
- Forum: Boiler and Pressure Vessel engineering
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Section VIII Failure Theory Basis
You are absolutely correct. The Div 1 allowables are based on maximum principal stress theory. I finally found a good reference explaining this. Pressure Vessels Design and Practice, by Somnath Chattopadhyay, 2005, CRC Press. Obviously this edition does not reflect the lastest change for Div...- cougaggie
- Post #3
- Forum: Boiler and Pressure Vessel engineering
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Section VIII Failure Theory Basis
In preevious versions of the Code the allowable stress intensity values were based on Tresca (Max Shear Stress) Failure theory. I see the latest version of Div 2 has been converted to Von Mises (max strain energy) failure theory. Is Div 1 still based on Tresca, or have the allowable values for...- cougaggie
- Thread
- Replies: 2
- Forum: Boiler and Pressure Vessel engineering
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Nozzle Loads for Seismic Analysis
I have a tall high temperature vessel analysis. The Data Sheet requires a dynamic seismic analysis oer ASCE4-98. the B&PV Code Version is 2009b. We are doing the analysis in ANSYS Workbench using 3-D elements. When we do the seismic analysis, do we also need to find the worst case...- cougaggie
- Thread
- Replies: 2
- Forum: Boiler and Pressure Vessel engineering
