Simulation Analysis on Navigation Indexes of Wanzhou Yangtze River Highway Bridge after the Anti-Collision Device Construction by Ship Model Test

After the anti-collision facility construction of Wanzhou Yangtze River Highway Bridge, the conditions of navigation in bridge area are complex. In order to study the navigation conditions of the reach and layout optimization measures, ensuring the safety of the ship navigation test has been carried out on the ship model navigation in the bridge area. According to the requirements of the maximum safety limit of the ship model test, the paper puts forward the best route, the control method and the difficulty of navigation through the analysis of the test results, and finally gives the recommendations and suggestions.

Interference Resistance of Pentamaran Ship Model With Asymmetric Outrigger Configurations

试验性的调查被执行在在平静的水里进展的一个 pentamaran 模型的全部的抵抗上估计干扰性能的关系。为这动机，总数轮船拖为不对称的悬臂梁配置和壳分离的几价值被执行，在范围 0.3-0.9 改变弗鲁德数字。当波浪干扰可以发生时，我们的结果显示在抵抗的显著变化在横向的距离价值(壳分离) 要求著名变化。另外，没有单个配置，一致地越过全部速度范围和最佳干扰因素超过另外的配置 0.2 与悬臂梁在 S/L=0.33 出现在 0.45 的一个弗鲁德数字外部位置：不对称为 A3 配置舷外。

Operational Modal Analysis of a Ship Model in the Presence of Harmonic Excitation

一艘轮船在极其复杂的环境下面被操作，并且波浪和风被假定是随机的刺激。而且，推进器，主人和机械设备能也导致泛音回答。以便减少结构的颤动，获得一艘轮船的形式的参数信息是重要的。然而，自从刺激信息是困难的获得，传统的形式的参数鉴定方法不是合适的。自然刺激 technique-eigensystem 实现算法(下时代) 是仅仅从反应信号提炼形式的参数的一个运作的形式的鉴定方法，并且它基于到结构的输入是纯白噪音的假设。因此，当把下时代方法用于轮船结构时，学习泛音刺激的影响是必要的。这篇研究论文的结果在周围的刺激下面显示实际经验，仅仅当泛音频率不离形式的频率太靠近时，轮船模型实验成功地在形式的参数鉴定被做。

Study on the Digital Manufacturing System of Ship Model Surface

Because a ship model surface (SMS) is a large double-curved 3-D surface,the machining efficiency of the cur- rent handcraft manufacturing method are very low,and the precision is difficult to control also.In order to greatly improve the machining efficiency and precision of SMS,based on the CAD/CAM/CNC technology,this paper proposed a model of SMS digi- tal manufacturing system,which is composed of five functional modules (preprocess module,CAD module,CAM module,post- process module and CNC module),and a twin-skeg SMS as an example,the key technologies & design principle of the nodtules were investigated also Based on the above research works,the first set of 4-axis SMS Digital Manufacturing System in China has been successfully developed,which can reduce the machining time of the twin-skeg SMS from 30 working days needed for the cur- rent handcrafting manufacturing method to 8 hours now,and which can control more effectively the precision of SMS also.

Experimental and Numerical Investigations on Vibration Characteristics of a Loaded Ship Model

在这篇论文，在有限液体领域的结构的颤动特征用 a coupled 被分析有限元素方法。增加的集体矩阵与有限元素方法被计算(女性) 由 8 节点声学的液体元素。在有限液体领域的结构的颤动特征被计算联合结构女性的集体矩阵。由写相关程序，沉没伸臂的颤动特征上的数字分析在有限液体领域和装载轮船模型的矩形的板被执行。为在空中并且在水里的装载轮船模型的一个形式的鉴定实验被进行，实验结果验证数字分析的可靠性。数字方法能在有限液体领域在颤动特征和结构的声学的放射问题上被用于进一步的研究。

Improved parameter identification algorithm for ship model based on nonlinear innovation decorated by sigmoid function

This paper investigates the problem of parameter identification for ship nonlinear Nomoto model with small test data,a nonlinear innovation-based identification algorithm is presented by embedding sigmoid function in the stochastic gradient algorithm.To demonstrate the validity of the algorithm,an identification test is carried out on the ship‘SWAN’with only 26 sets of test data.Furthermore,the identification effects of the least squares algorithm,original stochastic gradient algorithm and the improved stochastic gradient algorithm based on nonlinear innovation are compared.Generally,the stochastic gradient algorithm is not suitable for the condition of small test data.The simulation results indicate that the improved stochastic gradient algorithm with sigmoid function greatly increases its accuracy of parameter identification and has 14.2%up compared with the least squares algorithm.Then the effectiveness of the algorithm is verified by another identification test on the ship‘Galaxy’,the accuracy of parameter identification can reach more than 95%which can be used in ship motion simulation and controller design.The proposed algorithm has advantages of the small test data,fast speed and high accuracy of identification,which can be extended to other parameter identification systems with less sample data.

Modeling of Ship Maneuvering Motion Using Neural Networks

在这篇论文，神经网络(NN ) 在当模特儿调遣运动的轮船被使用。一个非线性的反应模型和轮船调遣的一个线性水动力学模型打手势也被调查。在模型的可操作性索引和线性非维的水动力学衍生物被使用识别二层喂前面的 NN。参量的评价的稳定性被证实。然后，调遣运动的轮船基于获得的模型被预言。在预言的结果和模型测试结果之间的比较表明建议当模特儿的方法的有效性。

Modeling and designing for ship steering integrated simulator

The modeling of a ship steering integrated simulator(SSIS)applied to the design,debugging and maintenance of an autopilot is discussed.A nonlinear responsive model is proposed and applied to the design of SSIS.The SSIS generates real signals of the ship heading,the rudder angle,the ship position and the output to the autopilot.A variety of factors,such as ship speed variety,shallow water effect,nonlinearity of yaw and actuator,and environmental disturbances like wind,wave and current are considered carefully.Detailed formulas for calculating relevant parameters are provided.Taken a naval ship as an example,the physical-digital simulations on SSIS and the digital simulation on a Marine System Simulator(MSS)were conducted separately in various sailing conditions.Simulation results show that the simple nonlinear responsive model can be applied to ship motion control and simulation with sufficient accuracy and effectiveness.

Research on a Multi-grid Model for Passenger Evacuation in Ships

In order to enhance the authenticity and accuracy of passenger evacuation simulation in ships, a new multi-grid model was proposed on the basis of a traditional cellular automata model. In the new model finer lattices were used, interaction of force among pedestrians or between pedestrians and constructions was considered, and static floor fields in a multi-level exit environment were simplified into cabin and exit static floor fields. Compared with the traditional cellular automata model, the multi-grid model enhanced the continuity of the passengers'track and the precision of the boundary qualifications. The functions of the dislocation distribution of passengers as well as partial overlap of tracks due to congestion were realized. Furthermore, taking the typical cabin environment as an example, the two models were used to analyze passenger evacuation under the same conditions. It was found that the laws of passenger evacuation simulated by the two models are similar, while the simulation's authenticity and accuracy are enhanced by the multi-grid model.

Path following control of underactuated ships based on nonswitch analytic model predictive control

A path following controller is developed for underactuated ships with only surge force and yaw moment available to follow a predefined path.The proposed controller is based on nonswitch analytic model predictive control.It is shown that the optimal control law for a nonlinear path following system with ill-defined relative degree is continuous and nonsingular.The problem of ill-defined relative degree is solved.The path-following ability of the nonlinear system is guaranteed.Numerical simulations are provided to demonstrate the effectiveness of the proposed control law.

A Non-geometrically Similar Model for Predicting the Wake Field of Full-scale Ships

规模效果导致在模型规模和实际轮船的 wake 地之间的大差异，并且在在预言实际轮船的表演的成穴性能和令人激动的力量测试引起差别。因此，从轮船模型的测试数据是什么时候，直接使用了预言实际轮船的表演，测试结果必须受到实验修正。这研究为壳模型的反向的设计建议一个方法。比作一个几何上类似的壳模型，修改模型产生的 wake 地接近一艘实际轮船的。一非 -- 轮船和海洋工程(KRISO ) s 容器轮船(KCS ) 的一个朝鲜研究院的几何上类似的模型被设计。数字模拟用这个模型被执行，并且它的结果与照原尺寸的计算结果相比。由非几何上类似的模型得到照原尺寸的轮船的 wake 领域的变丑方法成功地被用于 KCS。

A Nonlinear Rheological Model of Soft Clay and Its Application in Settlement of Sunk Ship

A one-dimensional consolidation-creep model test on the creep deformation of soft muddy clay in the littoral area of Tianjin is performed. A nonlinear rheologic model is established and the model coefficients are determined, in consideration of the characteristics of soft muddy clay. Furthermore, a settlement equation is deduced from the theologic model and verified by the field settlement measurements of Beitang Reservoir dam in Tianjin littoral area. Finally, the settlement e- quation is applied in calculating the settlement of ＂FAIRWAY-＂ suction dredger, which sunk in the external channel of Tianjin Port, induced by the soft clay consolidation of seabed. These results provide useful information for the decision of salvage plan.

Line of sight waypoint guidance for a container ship based on frequency domain identification of Nomoto model of vessel

CIFER software is used to identify steering and roll dynamics of a container ship. In this software, advanced features such as the Chirp-Z transform(CZT) and composite window optimization are applied to the time history of steering and roll dynamics to extract high quality frequency responses. From the extracted frequency responses, two linear transfer functions of Nomoto model are fitted for yaw and roll dynamics of the vessel. Based on the identified Nomoto model, a PID heading controller and a Kalman filter observer are constructed. The simulation results of heading controller for line of sight(LOS) waypoint guidance show excellent tracking of pilot inputs in the presence of wave induced motions and forces.

COSCO Shipping Acquisition as A Success Model for Greece-China Cooperation

On July 4th,2016,China COSCO Shipping Corporation Limited('COSCO SHIPPING'or'the Group')and the Hellenic Republic Asset Development Fund(HRADF)signed a letter in Beijing,confirming that the conditions defined in the previously signed Share Purchase Agreement(SPA)have been fulfilled.It marks a decisive achievement for COSCO SHIPPING’S

Study of the ship design process model for collaborative design

The ship design process model is the basis for developing the ship collaborative design system under network environment.According to the characteristics of the ship design, a method for dividing the ship design process into three layers is pat forward, that is project layer, design task layer and design activity layer, then the formalized definitions of the ship design process model, the decomposing principles of the ship design process and the architecture of the ship collaborative design (SDPM) system are presented. This method simplifies the activity network, makes the optimization and adjustment of the design plan convenient and also makes the design process easier to control and change, at last the architecture of the ship collaborative design system is discussed.

Pendulation reduction on ship-mounted container crane via T-S fuzzy model

Ship-mounted container cranes are challenging industrial applications of nonlinear pendulum-like systems with oscillating disturbance which can cause them unstable.Since wave-induced ship motion causes the hoisted container to swing during the transfer operation,the swing motion may be dangerously large and the operation must be stopped.In order to reduce payload pendulation of ship-mounted crane,nonlinear dynamics of ship-mounted crane is derived and a control method using T-S fuzzy model is proposed.Simulation results are given to illustrate the validity of the proposed design method and pendulation of ship-mounted crane is reduced significantly.

基于Modelica的船舶电力推进系统仿真研究

船舶电力推进系统的仿真建模技术研究多集中于数学模型,对设备模型实际物理结构的关注不多。针对这一现状,本文基于Modelica建立了船舶电力推进系统推进装置部分的仿真模型,直接面向物理结构提出了一种基于dq坐标等效电路的Modelica六相永磁同步电机模型。基于所建立的推进装置模型,进行了系统及仿真验证,结果表明所建立模型较好地模拟了电力推进系统的运行状态,适合于系统工程中系统级的仿真验证。所建立模型在实际工程中更加易于在不同领域的设计人员中流通使用。

船模静水参激横摇阻尼测量实验研究

针对船舶参数横摇独特的运动特征,设计激励稳性参数的船模静水参激横摇实验,研究与船舶参数横摇特征吻合的横摇阻尼测量方法.基于船舶参数横摇机理,设计了由激励船模重心高度的激振器,控制电机与测量船模运动的测控仪为主要设备组成的实验系统.由阻尼耗散、激励释放和复原力矩三项能量的平衡,推导了横摇阻尼系数的计算公式.露天船模水池的静水参激横摇阻尼测量实验.结果表明:稳态响应的横摇幅值持续稳定,大幅横摇阻尼可测,实验测量的重复性好.