MapleSim Used to Model the Dynamics of an Ice Tank Carriage - Maplesoft

Case Study:
MapleSim Used to Model the Dynamics of an Ice Tank Carriage

Maneuvering through ice-covered waters requires a special ship design, commonly known as an icebreaker. Before an icebreaker is constructed, the hull is rigorously tested for its ice breaking capabilities in an ice tank. An ice tank is a refrigerated water tank in which a scale model of the ship’s hull is pulled by a gantry carriage through a layer of formed ice.

Problems inherent in the design of the ice tank can distort test results or even prevent testing completely. Often, the speed of the model ship becomes unstable when the gantry carriage is operating at low speeds. The force generated by the ship’s hull when breaking ice creates backlash between the gears driving the gantry carriage. In an attempt to compensate for the backlash, the controller causes the speed of the model ship to overshoot and then undershoot, causing damage to the test rig. To alleviate these issues, MapleSim, Maplesoft’s advanced system-level modeling and simulation tool, can be used to model the dynamics of an ice tank carriage and identify a mechanism to alleviate the backlash inherent in the design of the gearbox.

First, MapleSim is used to create a high-fidelity physical model of the ice tank system. A preload torque component is added to the output shaft of the gearbox to minimize backlash. Using the MapleSim Optimization template, the minimum required preload torque, to achieve minimal chatter between gear teeth, is calculated. Finally, the solution is validated by simulating it in MapleSim.

MapleSim’s graphical working environment allows engineers to easily mix components from different domains without having to worry about underlying equations. The proposed solution is validated quickly, efficiently and with minimal cost.

Contact Maplesoft to learn how MapleSim can be used in your projects.