Ali SOFUYEV, Orhan AKSOĞAN, Abdullah H. SOFIYEV

The stability of a laminated composite truncated conical shell under a dynamic external pressure

Bu makalede tabakalı kesik konik bir kabuğun zamana göre kuvvet fonksiyonu şeklinde değişen uniform dış basınç yükü etkisi altında dinamik stabilitesi incelenmiştir. Önce Donnell tipi dinamik stabilite denklemleri çıkarılmış, sonra temel denklemlere Galerkin yöntemi ve Sachenkov ve Baktieva [1] tarafından sunulan yöntem, bazı düzenlemelerle uygulanarak dinamik ve statik kritik yükler, bunlara karşı gelen dalga sayılan ve dinamiklik katsayısı için formüller elde edilmiştir. Son olarak da değişik dizilişli kesik konik kabuklar için tabaka sayısı, tabaka dizilişi ve dış basınç ifadesinde zamanın kuvvetinin değişiminin kritik parametrelere etkileri sayısal olarak incelenmiş ve bu etkilerin önemli düzeyde olduğu anlaşılmıştır.

Tabakalı kesik konik bir kabuğun dinamik bir dış basınç etkisi altında stabilitesi

The present study considers the dynamic stability of a laminated composite conical shell, subject to a uniform external pressure which is a power function of time. At first, the dynamic stability and compatibility equations of a laminated elastic conical shell, subject to an external pressure, have been obtained. Then, employing Galerkin 's method, those equations have been reduced to a system of time dependent differential equations with variable coefficients. Finally, applying a modified form of the method given by Sachenkov and Baktieva [1], the critical dynamic and static loads, the corresponding wave numbers and the dynamic factor have been found analytically. Using those results, the effects of the variations of the number and ordering of the layers and the power of time in the external pressure expression are studied through pertinent computations. It is observed that these factors have appreciable effects on the critical parameters pf the problem in the heading.

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