Internet Archive Scholar

DETERMINATION OF SOME PARAMETERS OF PROTECTIVE VISCOELASTIC COATING BY HELP SHEAR NORMAL WAVES
ОПРЕДЕЛЕНИЕ НЕКОТОРЫХ ПАРАМЕТРОВ ЗАЩИТНОГО ВЯЗКОУПРУГОГО ПОКРЫТИЯ С ПОМОЩЬЮ СДВИГОВЫХ НОРМАЛЬНЫХ ВОЛН

V.I. Erofeev, Mechanical Engineering Research Institute of the Russian Academy of Sciences - Branch of Federal Research Center "Institute of Applied Physics of the RAS", Nizhny Novgorod, Russian Federation., N.V. Klyueva, I.N. Soldatov, National Research Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russian Federation., Mechanical Engineering Research Institute of the Russian Academy of Sciences - Branch of Federal Research Center "Institute of Applied Physics of the RAS", Nizhny Novgorod, Russian Federation., Mechanical Engineering Research Institute of the Russian Academy of Sciences - Branch of Federal Research Center "Institute of Applied Physics of the RAS", Nizhny Novgorod, Russian Federation.
2018 Problems of Strength and Plasticity  

Preserved Fulltext

fulltext thumbnail
Web Archive Capture PDF (2.8 MB)
https://web.archive.org/web/20190723040854/http://ppp.mech.unn.ru:80/index.php/ppp/article/download/454/440

A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL. The file type is application/pdf.

1 Èíñòèòóò ïðîáëåì ìàøèíîñòðîåíèÿ ÐÀÍ − ôèëèàë Ôåäåðàëüíîãî èññëåäîâàòåëüñêîãî öåíòðà «Èíñòèòóò ïðèêëàäíîé ôèçèêè Ðîññèéñêîé àêàäåìèè íàóê», Íèaeíèé Íîâãîðîä, Ðîññèéñêàÿ Ôåäåðàöèÿ 2 Íàöèîíàëüíûé èññëåäîâàòåëüñêèé Íèaeåãîðîäñêèé ãîñóäàðñòâåííûé óíèâåðñèòåò èì. Í.È. Ëîáà÷åâñêîãî, Íèaeíèé Íîâãîðîä, Ðîññèéñêàÿ Ôåäåðàöèÿ erof.vi@yandex.ru Ïîñòóïèëà â ðåäàêöèþ 15.03.2018 Èññëåäóåòñÿ äåôîðìèðóåìîå òâåðäîå òåëî, ñîñòîÿùåå èç ïðîèçâîëüíîãî ÷èñëà ñëîåâ ðàçíîé òîëùèíû, ïëîòíîñòè è óïðóãèõ ìîäóëåé ñäâèãà.
more » ... åðõíèé ñëîé, ìîäåëèðóþùèé çàùèòíîå ïîêðûòèå, íàíåñåííîå íà ìíîãîñëîéíûé ýëåìåíò êîíñòðóêöèè, ïîñëåäîâàòåëüíî íàäåëÿåòñÿ ñâîéñòâàìè óïðóãîãî ìàòåðèàëà è âÿçêîóïðóãîãî ìàòåðèàëà. Âî âòîðîì ñëó÷àå äëÿ îïèñàíèÿ ïîãëîùåíèÿ àêóñòè÷åñêîé ýíåðãèè â âåðõíåì ñëîå ïðèìåíÿåòñÿ ìîäåëü Ôîéãòà, â êîòîðîé íàïðÿaeåíèÿ ëèíåéíî çàâèñÿò îò äåôîðìàöèé è ñêîðîñòåé äåôîðìàöèé. Èçó÷àþòñÿ îñîáåííîñòè ðàñïðîñòðàíåíèÿ ãîðèçîíòàëüíî-ïîëÿðèçîâàííîé ñäâèãîâîé óïðóãîé âîëíû (SH-âîëíû). Ïðè îòðàaeåíèè òàêîé âîëíû îò ñâîáîäíîé ïëîñêîñòè íå âîçáóaeäàþòñÿ äèëàòàöèîííûå âîëíîâûå äâèaeåíèÿ. Ïîëó÷åíû ôîðìóëû äëÿ êîýôôèöèåíòà åå çàòóõàíèÿ è èçìåíåíèÿ ôàçîâîé ñêîðîñòè, îáóñëîâëåííûõ âÿçêîóïðóãèì ïîêðûòèåì. Ïîêàçàíî, ÷òî ýòè ôîðìóëû ïîçâîëÿþò îïðåäåëèòü ìîäóëü ñäâèãà, êîýôôèöèåíò ñäâèãîâîé âÿçêîñòè è òîëùèíó ïîêðûòèÿ ñ ïîìîùüþ èçìåðåíèé ôàçîâîé ñêîðîñòè è êîýôôèöèåíòà çàòóõàíèÿ äâóõ ìîä SH-âîëíû. Ïîäðîáíî ðàññìîòðåí äâóõñëîéíûé âîëíîâîä äëÿ ñëó÷àÿ, êîãäà îñíîâíîé (íèaeíèé) óïðóãèé ñëîé ÿâëÿåòñÿ áîëåå «ñêîðîñòíûì» (òî åñòü èìååò áîëüøèé ìîäóëü ñäâèãà), áîëåå ïëîòíûì ïî ñðàâíåíèþ ñ âåðõíèì ñëîåì è èìååò íåñêîëüêî áîëüøóþ òîëùèíó. Òàêîé ñëó÷àé òèïè÷åí íå òîëüêî äëÿ òåõíèêè, ãäå ÷àñòî èñïîëüçóþòñÿ îòíîñèòåëüíî ìÿãêèå çàùèòíûå ïîêðûòèÿ (ïîëèìåðíûå, ëàêîêðàñî÷íûå, áèòóìíûå), íî è äëÿ ãåîôèçèêè. Ïîêàçàíî, ÷òî íà íèçêèõ ÷àñòîòàõ îòëè÷èÿ îò âîëíîâîäà, öåëèêîì ñîñòîÿùåãî èç îäíîãî óïðóãîãî âûñîêîñêîðîñòíîãî ñëîÿ, íåâåëèêè. Íà íèçêîé ÷àñòîòå íèçøèå ìîäû ïî÷òè «íå ÷óâñòâóþò» íàëè÷èÿ òîíêîãî íèçêîñêîðîñòíîãî ñëîÿ. Ñ ðîñòîì ÷àñòîòû îòëè÷èÿ ñòàíîâÿòñÿ âñå áîëåå çàìåòíûìè. Ìîäû ñòàíîâÿòñÿ âñå áîëåå ïîõîaeèìè íà âîëíû Ëÿâà, èõ ñêîðîñòè ïðè ñòðåìëåíèè ÷àñ-ÏÐÎÁËÅÌÛ ÏÐÎ×ÍÎÑÒÈ È ÏËÀÑÒÈ×ÍÎÑÒÈ, ò. 80, ¹ 3, 2018 ã. * Âûïîëíåíî â ðàìêàõ ãîñóäàðñòâåííîãî çàäàíèÿ ÈÏÔ ÐÀÍ íà ïðîâåäåíèå ôóíäàìåíòàëüíûõ íàó÷íûõ èññëåäîâàíèé íà 2013−2020 ãã. ïî òåìå ¹ 0035-2014-0402 (¹ ãîñðåãèñòðàöèè 01201458047) è ïðè ÷àñòè÷íîì ôèíàíñèðîâàíèè ÐÔÔÈ (ãðàíò ¹ 18-08-00715).
doi:10.32326/1814-9146-2018-80-3-303-315 fatcat:chpesqcibbdgfaaoagiqacsh4m
Citation

V.I. Erofeev, Mechanical Engineering Research Institute of the Russian Academy of Sciences - Branch of Federal Research Center "Institute of Applied Physics of the RAS", Nizhny Novgorod, Russian Federation., N.V. Klyueva, I.N. Soldatov, National Research Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russian Federation., Mechanical Engineering Research Institute of the Russian Academy of Sciences - Branch of Federal Research Center "Institute of Applied Physics of the RAS", Nizhny Novgorod, Russian Federation., Mechanical Engineering Research Institute of the Russian Academy of Sciences - Branch of Federal Research Center "Institute of Applied Physics of the RAS", Nizhny Novgorod, Russian Federation.. "DETERMINATION OF SOME PARAMETERS OF PROTECTIVE VISCOELASTIC COATING BY HELP SHEAR NORMAL WAVES." Problems of Strength and Plasticity 80.3 (2018) 303-315