Abstract
In order to predict the vibration and noise level in a ship by simulation, and achieve optimum design, it is therefore required to evaluate accurately engine the exciting forces running through the engine installation base. However, generally it is difficult to calculate engine exciting forces, such as combustion pressure, unbalanced inertia force by piston and connecting rod, and unbalanced rotating inertia force by the crankshaft. So, the measurements of exciting forces of actual engine were tried by use of two methods. The results are described as follows.
