???r? t?? s???rs?r??t ???? st???s ??r ???tr????????r?????? ??? t?r? S c (b) ?s t?? s?? ,
? ??? ??? t???r???? ??s s?t t? tol = 10 ?4 ? ??t?r ????? ? ?r???????r? s?????t??? ??r ?r?? ????? s??? ???r? ?? s?? t??t t?? r???t??? s????? ?rr?r ??s ??ss t??? 0.005 ?t b = 2000s/mm 2 ? ????? ?s s??????t ????r??? ??r t?? ???? ???????t??? ???r? t??r? ?s s???, 1000. ,
85×10 ?3 mm 2 /s? ????? t?? AK 0 st??s ?r???? 0.6? ???s ?? s?? t??t t?? AK 0 ?s q??t? ???? ??t???? 10ms ??? 40ms ??r t?? ????r??t ?????s ?? t?? s???r???? ????s ??r???????t?? ?????s? t?? AK 0 ?s s? ???? ?t ???t? ??r???????t?? t??s s?t ?? s?????t???s ??t t? q??st??? t?? ?ss???t??? t??t t?? ??tr?????????r s???? ??? t?? s???r???? ????s, ???r??s?s ?r?? 1.05×10 ?3 mm 2 ,
??r ?????s ?? s???r???? ???? ??r???????t? ? ? s = 0m/s ?s???? ?????? ? = 1 × 10 ?5 m/s ???s????ts?? ? = 1 × 10 ?4 m/s ???s??s?? ? = ?m/s ???ts?? ??r? s?????t?? ?? t?? ??s??s ??t? s??t??? ??s?r?t???t??? h = 0 ,