Iibheringi eziziithafa ezingqukuva (SBPs) zinemiphezulu yoqhagamshelwano "efanelekileyo" engqukuva, uhlobo loqhagamshelwano olwaziwa ngokuba luqhagamshelwano olulungelelanisiweyo. Iindlela zokubala zeepropathi zoomatshini ze-SBP zibalulekile kuyilo lwazo lwesakhiwo kunye nohlalutyo lokunxiba. Ukubala uxinzelelo loqhagamshelwano kwiindawo ezilungelelanisiweyo yingxaki enzima. Imodeli ekhoyo yeHertz, elinganiselwe kwizithuba ezilastiki -, ayinakusetyenziswa ukubala unikezelo loxinzelelo kuqhagamshelwano olungqukuva olungqukuva. Imodeli yoqhagamshelwano edibeneyo ye-spherical, imodeli ye-Fang, ijongana ngokufanelekileyo nomcimbi wokusasazwa koxinzelelo loqhagamshelwano kwiindawo ezingqukuva ezinokukhubazeka okuncinci. Lo mfuziselo usebenza kubo bobabini abangangqinelaniyo nabanxibelelanisiweyo{6}}abafowunelwa. Nangona kunjalo, indawo yoqhagamshelwano ye-SBP ayikho i-sphere egqibeleleyo, ngoko ke ukubalwa koxinzelelo loxinzelelo loqhagamshelwano kufuna ukubalwa okuthe kratya okusekelwe kwimodeli yoqhagamshelwano elungelelanisiweyo ye-spherical. Ngaphezu koko, imiphumo yemida yamahhala inokuthi yenzeke ngexesha lokusebenza kwee-SBP, ezichaphazela ukusetyenziswa kwazo. Esi siphumo somda samahhala siphumela ekuxinzezeleni koqhagamshelwano olugxininisiweyo kunye ne-gradient enkulu yoxinzelelo kumda we-SBP yangaphandle.