Official Answer
Answer
Ƙarfafawar maɓuɓɓugar ruwan raƙuman ruwa ya yi daidai da lokacin raƙuman ruwa. Mafi girman adadin taguwar ruwa $n$ yana ƙara taurin radial kuma yana rage yuwuwar buckling a gefe. Koyaya, yayin da $n$ ke ƙaruwa, ƙimar bazara $k$ yana ƙaruwa da ƙarfin 4 ($ n^4$), yana sa bazarar ta yi ƙarfi sosai. Don maɓuɓɓugan juyawa masu yawa, rabon tsayin kyauta $H_f$ zuwa ma'anar diamita $D_m$ yana da mahimmanci; idan $H_f/D_m> 1.5$, jagora na ciki ko na waje (sanda ko bore) ya zama tilas. Matsakaicin ƙaddamarwa yana isa lokacin da nauyin axial ya haifar da damuwa na tangential wanda ya wuce mahimmin nauyin buckling $P_{cr} = _x000c_rac{_x0008_eta imes E imes I}{L^2}$, wanda aka gyara don juzu'i na raƙuman ruwa.
