Comparing structural models of linear elastic responses to bending in inosculated joints

Degree of Bending (DoB) in Tubular KT-Joints of Jacket Structures Subjected to Axial Loads

The fatigue life of tubular joints commonly found in offshore industry is not only dependent on the value of Hot-spot stress (HSS), but is also significantly influenced by the through-the-thickness stress distribution characterized by the degree of bending (DoB). The determination of DoB values in a tubular joint is essential for improving the accuracy of fatigue life estimation using the stres...

Non-structural controllability of linear elastic systems with structural damping

This paper proves that any initial condition in the energy space for the plate equation with square root damping ζ̈ − ρ∆ζ̇ +∆2ζ = u on a smooth bounded domain, with hinged boundary conditions ζ = ∆ζ = 0, can be steered to zero by a square integrable input function u supported in arbitrarily small time interval [0, T ] and subdomain. As T tends to zero, for initial states with unit energy norm, th...

On Bending of Elastic Plates*

Stress Concentration Factors in Uniplanar Tubular KT-Joints of Jacket Structures Subjected to In-Plane Bending Loads

In the present research, data extracted from the stress analysis of 46 finite element models, verified using test results obtained from an experimental investigation, were used to study the effect of geometrical parameters on the chord-side stress concentration factors (SCFs) of central and outer braces in uniplanar tubular KT-joints of offshore structures subjected to four different types of i...

optimal motion generating of nonholonomic manipulators with elastic revolute joints in generalized point-to-point task

this paper presents optimal control method to path planning of mobile robots with flexible joints. dynamic equations are derived and additional kinematic constraints are used to solve the extra dofs arose from base mobility. then with modeling the elasticity at each joint as a linear torsinal spring, the set of equations are formed. the hamiltonian function is formed and the necessary condition...