Nonlinear Analysis of Underwater Towed Cable Using Robust Nodal Position Finite Element Method

buckling of viscoelastic composite plates using the finite strip method

در سال های اخیر، تقاضای استفاده از تئوری خطی ویسکوالاستیسیته بیشتر شده است. با افزایش استفاده از کامپوزیت های پیشرفته در صنایع هوایی و همچنین استفاده روزافزون از مواد پلیمری، اهمیت روش های دقیق طراحی و تحلیل چنین ساختارهایی بیشتر شده است. این مواد جدید از خودشان رفتارهای مکانیکی ارائه می دهند که با تئوری های الاستیسیته و ویسکوزیته، نمی توان آن ها را توصیف کرد. این مواد، خواص ویسکوالاستیک دارند....

Geometrically nonlinear analysis of axially functionally graded beams by using finite element method

The aim of this paper is to investigate geometrically nonlinear static analysis of axially functionally graded cantilever beam subjected to transversal non follower load. The considered problem is solved by finite element method with total Lagrangian kinematic approach. The material properties of the beam vary along the longitudinal direction according to the power law function. The finite elem...

Position Estimation of a Towed Underwater Body

Dynamic Simulation of a Multi-Cable Underwater Towed System

In this paper, a numerical method for dynamic simulation of a multicable underwater towed system is proposed. The system consists of a tow cable, a towed body and two arrays. The equations of motion for cables are based on Ablow and Schechter (1983) and the six-degree-offreedom ordinary differential equations are used in analyzing motion of a towed body. The boundary conditions of the system ar...

Dynamic Behavior of Underwater Towed-cable in Linear Profile

In this paper, a numerical approach is presented which is capable of predicting dynamic behavior of underwater towedcable structures when tow-ship changes its speed in a fixed direction making linear profile. A three-dimensional model of underwater towed system is studied. The governing equations for the system are solved by using a central finite-difference method. The solution of the finite-d...