Verification by numerical simulations of dynamic responses in machinery systems
Purpose
To perform numerical simulations of shafting dynamics to evaluate system functionality and fitness for purpose. Simulations give valuable insight into complex system behaviour and component interactions, and are important for component selection, design optimisation and troubleshooting.
System simulation is the best methodologyfor revaling real dynamic responses in normal steady state and transient conditions. It enhances both the visualisation and understanding of the behaviour of complex machinery systems.
Benefits
Machinery simulations as an integrated design tool ensure operations with a minimum of trouble and off-hire through:
Performance evaluations confirming system functionality and fitness for purpose, identifying possibilities and limitations, and with an optimal scope of in-situ testing.
Proper component selection to avoid normally good components constituting a poor system.
Optimised shafting design and machinery operation by more flexible propulsion lines for easier shaft alignment, with a minimum of bearing loads, in flexible hulls.
DNV has specialist expertise in performing machinery simulations for damage investigations, which in combination with in-situ measurements are used to identify the root cause of problems, to test solutions to increase the lifetime of machinery, and to eliminate future unexpected repair and maintenance costs.
Features
The technology is available for the maritime, offshore oil & gas and land-based industries, and is a concise way of analysing a power plant, a propulsion system or other machinery systems. Different machinery disciplines, such as the following, can be combined in the same system:
Mechanical engineering
Electrical engineering
Control engineering
Thermodynamics
Hydrodynamics
The dynamic responses, such as torque and stress loads, speed variations and stability, thermal loads, electric power and current, from interactions between the different components in a power system - from the diesel engine, gas turbine or electric motor, via couplings, gear transmissions and shaft line to the propeller, water jet or generator - can be simulated.