Êàðà÷óí Â.Â., Ìåëüíèê Â.Í.

Íàöèîíàëüíûé òåõíè÷åñêèé óíèâåðñèòåò Óêðàèíû «ÊÏÈ»

ÖÈÊËÈ×ÅÑÊÈ ÄÅÔÎÐÌÈÐÓÅÌÛÉ ÀÊÓÑÒÈ×ÅÑÊÈÌ ÍÀÃÐÓÆÅÍÈÅÌ ÏÎÏËÀÂÊÎÂÛÉ ÏÎÄÂÅÑ. ÏËÎÑÊÀß ÇÀÄÀ×À

 

Ïðîäîëüíûå ïåðåìåùåíèÿ. Ðàññìîòðèì äèôôåðåíöèàëüíûå óðàâíåíèå äâèæåíèÿ ïîâåðõíîñòè ïîïëàâêà:

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Èëè ïîñëå ñóììèðîâàíèÿ:

 (1)

Óìíîæèì ëåâóþ è ïðàâóþ ÷àñòè âûðàæåíèÿ (1) íà âåëè÷èíó  è ïðîèíòåãðèðóåì â ïðåäåëàõ îò  äî . Ïîëó÷àåì îáû÷íîå äèôôåðåíöèàëüíîå óðàâíåíèå äëÿ íàõîæäåíèÿ ôóíêöèè :

  ,           (2)

ãäå                             

;

              (3)

Âòîðîå óðàâíåíèå, äëÿ íàõîæäåíèÿ âåëè÷èí , ñîñòàâëÿåì, èñïîëüçóÿ òó æå àíàëèòè÷åñêóþ ïðîöåäóðó.  èòîãå èìååì:

   ,                  (4)

ãäå                         

                  (5)

Îêðóæíûå ïåðåìåùåíèÿ. Ðàññìîòðèì äèôôåðåíöèàëüíîå óðàâíåíèå óïðóãèõ ïåðåìåùåíèé ïîâåðõíîñòè âäîëü ïàðàëëåëè:

                                                                     

                              

                            

                                                 

                                                     

                                                                        

                                                                        

1                                                                           

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Ïðîñóììèðóåì âñå ñëàãàåìûå:

                               (6)

Óìíîæèì îáå ÷àñòè ýòîãî âûðàæåíèÿ íà  è ïðîèíòåãðèðóåì â ïðåäåëàõ îò  äî .

Ïîëó÷àåì:

ãäå                                 

Ïîâòîðÿåì ýòó æå ïðîöåäóðó:

                                                                                     

                                    

                            

                                                 

-                                                    

                                                                        

-                                                                      

1                                                                           

1                                                                           

Ïðîñóììèðóåì:

            (7)

Óìíîæàåì îáå ÷àñòè ýòîãî âûðàæåíèÿ íà  è ïðîèíòåãðèðóåì â ïðåäåëàõ  , . Ïîëó÷àåì:

  .            (8)