ABSTRACT

The velocity levels at the diesel engine feet can be measured during the testing of the diesel engines in the test rooms. As for the mobility of the diesel engine foundations, it can be achieved by measurement campaigns carried out on board of ships (Petersson & Plunt 1982) or simulating it by FE dynamic linear analysis. With regards to the estimation of the dynamic impedance of the resilient mount, special laboratory tests are to be carried out. The passive resilient mounts which usually are installed aboard ships are formed by a top and a base casting which are made of steel or cast iron, and allow the isolator to interface with the diesel engine and with the ship structures (see Figure 1 and Figure 2).