考虑艇体变形影响的轴系合理校中

Rational Shafting Alignment of Submersible Vehicle Considering Hull Deformations

为提高潜器推进轴系校中计算的准确度,使计算结果与实际情况更为接近,必须考虑艇体变形对轴承变位的影响,并将其作为轴系校中计算的初始边界条件。通过三维有限元计算,分析模型潜器的整艇湿表面结构在重力和水压作用下的变形情况,由此获得艇体艉部的结构变形数据。提出"共线程度"的概念和计算方法,将艇体结构变形数据转化为轴系各轴承相对变位数据,作为潜器推进轴系合理校中计算轴承的初始变位。利用轴系合理校中计算程序,在考虑艇体变形和轴承刚度的条件下,对模型潜器的轴系布置进行优化计算。结果表明:安装时,1#、2#、3#轴承位于理论中心线上,4#轴承变位为理论中心线向上0.4 mm能够获得合理的轴系校中状态。

To increase the accuracy of the calculation results of submersible vehicle propulsion shafting alignment and make it much closer to the actual situation, the hull deformation, which serves as the bound-ary condition of shafting alignment calculation, should be considered. Through 3D finite element analysis of hull deformation under the condition of hydrostatic stress and gravity, this paper analyzes the stern hull structure deformation. A notation and calculation method of“alignment degree”is presented, which con-verts the hull deformation to the bearing offset, which is the initial value of shafting system alignment. With the shafting system alignment program, the shaft arrangement optimization is conducted on a model sub-mersible vehicle, taking hull deformation and bearing stiffness into account. The results show that when bearing No.1, No.2, and No.3 are on the zero offset, and bearing No.4 0.4 mm being above the line, satisfy-ing shaft alignment situation can be achieved.