TESTING & RESEARCH
Thruster Dynamometer Test Stand
Introduced in 2001, the full system IHS Test Apparatus definitively ensures that the systemís original design engineers, under measurable factory test conditions, solve any undesirable hydraulic anomalies such as ďcross talkĒ among the various combinations of hydraulic consumers. This avoids wasteful post-installation troubleshooting by field service personnel operating under pressure and time constraints. The actual deliverable stabilizer, thruster, windlass, capstan, water pump, deck crane and all hydraulic consumers and components including main pumps contained in NAIAD IHS are tested together under real-world load conditions exactly as they will function in service. NAIADís system wide, Factory Acceptance Testing procedures raise the industry standard for proven and reliable IHS performance.
Stabilizer Roll Simulation Test Platforms
While time and labor intensive, our Factory Acceptance Testing ensures our customerís actual deliverable system has met or exceeded all specifications and our demanding quality standards. Customers are invited to attend the FAT of their system.
Research & Development
Motion Simulation and Analysis
The NAIAD simulation program first models the bare hull and simulates the design's uncontrolled state. The predicted uncontrolled motions can be compared to model test results to validate the simulation program. At this time adjustments to the mathematical model are made, if necessary. Next, using the active roll, pitch and yaw control devices driven by a NAIAD controller, the motions are predicted for the same sea conditions.
A technical memorandum summarizing the results of the simulations and discussing any design recommendation for improving seakeeping or directional control problems is provided to the customer. The results can be presented in graphical presentation for the standard deviation of heave, pitch, roll, sway and yaw motions, as well as vertical and lateral accelerations at customer selected locations. The vertical and lateral acceleration results may be used to calculate the Motion Sickness Incidence (MSI) and Motion Induced Interruption (MII). In addition, Response Amplitude Operators (RAO) of the vessel motions can be presented.
Estimations of the control surface resistance and power requirements are also available. If ride control is deemed necessary, a technical specification and quotation of the recommended system is provided.
NAIAD simulation programs have been validated against both model and
full-scale test data both with and without active ride control for a variety
of hull forms.