Journal of Dalian Maritime University >
2019 , Vol. 45 >Issue 3: 75 - 84
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2019.03.011
Maneuvering motion calculation and simulation of rescue ship under wave drift force
Received date: 2019-03-15
Revised date: 2019-05-08
Online published: 2019-05-08
The maneuverability of a rescue ship NHJ111 in short-crested irregular waves in deep water was studied. 3DOF nonlinear maneuvering equations were established by using the unified model. The resistance and propulsion dynamics were modeled by classical methods as well as forces and moments of the propeller, rudder and viscous crossflow. The method of Green function source was adopted to solve the boundary value problem (BVP) in frequency domain, and the mean wave drift forces were calculated by far-field formulas along with numerical verification. After that, the equations of motion were applied to NHJ111, and the turning motion in calm water was performed. It is found that the calculated results are in good agreement with the experimental data of the real ship, and the relative error is less than 8%. Then the turning motion simulation was numerically calculated in short-crested irregular waves in the sea state 6 in consideration of drift force. Accordingly, the established model is capable of simulating ship motions in waves with good precision and can be utilized in the rescue ship simulator. It lays the foundation for predicting rescue ship motions in rough sea.
ZHANG Xiao-lei , XIONG Wei , WANG Zu-wen . Maneuvering motion calculation and simulation of rescue ship under wave drift force[J]. Journal of Dalian Maritime University, 2019 , 45(3) : 75 -84 . DOI: 10.16411/j.cnki.issn1006-7736.2019.03.011
/
| 〈 |
|
〉 |