Dear Richard Ay,
As you have said you don't suggest to use this option. I get different result if i use this option, I know little about pressure stiffning, can you throw more light on it ,or is there any paper/comments or something discuss "pressure stiffning of straight pipe", so that i can learn some knowledge about it especially to power piping(such as 10Mpa or higher)
Comments from anyone else are also welcome!!
Thank you!
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whmwhm