3D打印技术在船舶锚系设计验证上的应用

传统锚系设计验证方法采用二维图纸输入结合木模拉锚的试验模式,针对其中存在木模修改费时且精度难以保证等问题,探索基于三维模型输入结合3D打印技术的锚系设计验证方法,总结锚系部件3D打印的基本工艺,并对3D打印的部件进行拉锚试验验证。结果表明,将3D打印技术运用于锚系设计验证可行,可提高试验的效率与准确性。

船舶锚系三维建模及拉锚试验的仿真分析

提出了一种基于ADAMS和UG的轮船锚系三维建模和拉锚过程动态仿真分析的方法,利用该方法可以验证锚链筒、锚穴形状、尺寸及在船上位置等设计的可行性,及时发现设计上存在的问题,根据仿真结果对锚链筒和锚穴位置和形状进行设计修正,取代传统的木模拉锚试验.该方法可节约人力物力,提高工作效率.通过对2600kW近海拖轮船首及锚系三维建模及基于ADAMS动力仿真分析,验证了该方法的正确性和可行性,并且具有木模拉锚试验所不能实现的优越性.

船舶锚系三维放样设计与拉锚虚拟实验分析

以三维软件为平台建立船舶锚系的三维模型,将该模型转入到动力学分析环境,在动力学分析环境中对模型施加约束和力,进行动力学虚拟仿真实验,通过虚拟样机实验分析不同锚台对锚的运动及锚与锚唇贴合的影响。实验结果为锚系设计提供了参考依据。

UG仿真拉锚在船舶建造中的实践

主要介绍了我公司在31.8万吨级VLCC建造过程中,应用UG平台进行拉锚仿真试验,利用该方法验证锚系设计的合理性及建造定位的准确性,为顺利完成整个锚系的建造提供了良好的依据,且验证了UG仿真拉锚的工程合理性与实用性,达到了缩短船舶锚系建造周期、节省返修人工成本的目的,实现了实际拉锚一次成功的目的。

3-D computational method of wave loads on turret moored FPSO tankers

A three-dimensional method of calculating wave loads of turret moored FPSO (Flo ating Production Storage and Offloading) tankers is presented. The linearized restoring forces acting on the ship hull by the mooring system are calculated according to the catenary theory, which are expressed as the function of linear stiffness coefficients and the displacements of the upper ends of mooring chains. The hydrodynamic coefficients of the ship are calculated by the three-dimensional potential flow theory of the linear hydrodynamic problem for ships with a low forward speed. The equations of ship motions are established with the effect of the restoring forces from the mooring system included as linear stiffness coefficients. The equations of motions are solved in frequency domain, and the responses of wave-induced motions and loads on the ship can be obtained. A computer pro gram based on this method has been developed,and some calculation examples are illustrated. Analysis results show that the method can give satisfying prediction of wave loads.