關于ASME纏繞應力誤差范圍

Kenyonlin

在ASME Division III中的KF-913有寫到

If differences are noted between specified and measured compression at these checkpoints and there is reason to presume that the specified final compression will not be reached if the original program is followed, a change may be made in the remaining program by increasing the specified wire force by not more than 10%. The final difference between originally specified and measured compression shall not exceed 5%.

內容有提到如果我們的纏繞無法達到最終的壓縮量，可以通過增加拉力進行修改，這邊提到的拉力誤差范圍不超過10%，如果以等張力纏繞來說指的是指假設第第一層纏繞時預緊量不足，在第二層增加不超過10%的力合理，還是后續增加的力都必須控制在設計張力的10%

后續針對問題列出兩種可能 :

1.誤差的10%指的是下一層與上一層的差距

2.誤差的10%指的是如果理論計算出來每一層數值，每一層實際纏繞時增加的量不能超過理論計算的10%

曉昀

這是設計什么的標準？壓力容器？

Kenyonlin

曉昀 發表于 2019-6-19 21:13
這是設計什么的標準？壓力容器？

感謝版友的回覆

這是壓力容器的法規

andyany

If differences are noted between specified and measured compression at these checkpoints and there is reason to presume that the specified final compression will not be reached if the original program is followed, a change may be made in the remaining program by increasing the specified wire force by not more than 10%. The final difference between originally specified and measured compression shall not exceed 5%.
如果在檢查點上發現，壓縮的預定值和檢測值有差別，那就可以認為，按原始程序來最終達不到預定的壓縮。這時，可以在下來的程序里做一下修改，增加預定纏繞力，但不要大于10%。壓縮的原始預定值和檢測值的最終差異不應超過5%。

Kenyonlin

感謝版友 andyany

所以是指針對理論的數值10%以內

並不是指每一層與上一層之差異