Symmetric Wing Sections for the Switchback Motion of the Very Large Mobile Offshore Structure

We propose a new concept of VLMOS, which is composed of slender beams, demi-hulls and struts. The struts are wing-shaped, so that the wing induces a lateral force to counter the lateral wind drag force. The shapes of strut wings are symmetrical in the direction of the cord and their both ends have sharp edge. The main topic of this paper is to analyze the characteristic of the strut wings. We have carried out the model experiment and the calculation to estimate the performance of the strut wings.