基于有限元法的推进轴系回旋振动计算研究

对于舰船轴系或大型船舶,由于其转速高、轴系超长等特点,进行轴系回旋振动计算时,采用传统的传递矩阵法求解,往往容易出现数值不稳定和漏根现象,严重影响轴系固有特性计算的准确性,与轴系的实际运转情况不符。采用基于有限元法的计算模型,能较真实地反映物理模型且计算精度高。分析考虑多种因素对回旋振动的影响,利用可视化编程软件VB与ANSYS参数化设计语言混合编程,实现回旋振动软件开发并通过实例验证了算法及软件的正确性。软件界面友好、使用方便、计算效率高,能满足舰船轴系回旋振动计算的需要。

Whirling Vibration Caculation Research of Propulsion Shafting Based on Finite Element Method

In terms with the warship shaft or large vessel, for its high rotation speed and super-long length, calculating the whirling vibration of shafting by Transfer Matrix Method often results in numerical instability and Leakage phenomenon, which is not consistent with the actual situation, and would greatly affect the calculation accuracy of shafting inherent characteristics. By means of the finite element method calculation model, the parameter is more close to the actual situation, and high calculation accuracy is obtained. Considering the influence of various factors on the whirl vibration analysis, Using hybrid programming of VB and Ansys Parametric Design Language, whirl vibration calculation software development has been achieved, so as the validation of the arithmetic and software. Owing to its friendly interface, convenience of use, and calculation efficiency, the software would certainly meet the needs of ship shafting vibration calculation.