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Added Mass - MIT OpenCourseWare

Hydrodynamics Reading #6. Hydrodynamics Prof. Techet Added mass For the case of unsteady motion of bodies underwater or unsteady flow around objects, we must consider the additional effect (force) resulting from the fluid acting on the structure when formulating the system equation of motion. This Added effect is Added mass . Most floating structures can be modeled, for small motions and linear behavior, by a system equation with the basic form similar to a typical mass -spring-dashpot system described by the following equation: mx + bx + kx = f (t ) ( ). where m is the system mass , b is the linear damping coefficient, k is the spring coefficient, f(t) is the force acting on the mass , and x is the displacement of the mass .

version 3.0 updated 8/30/2005 -2- ©2005 A. Techet . 2.016 Hydrodynamics Reading #6 Considering all six degrees of freedom the Force Matrix is: u ... Following the definition for ...

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