摘要
为分析舰船推进轴系在多支承轴承处不同冲击作用下的冲击响应,采用有限元法和大质量法建立相应的计算模型(多支点不同激励).通过数值计算,分析了多支点不同激励下推进轴系冲击响应特征及与多支点相同激励下响应结果的差异.结果表明,多支点不同激励下推进轴系的冲击响应基本介于最大和最小多支点相同激励下的结果之间,有些位置处的响应结果最大误差高达30%以上.因此,若要较准确地预估推进轴系的冲击响应,应考虑各轴承处冲击载荷不同的影响.为简便起见,工程设计中可用各轴承处最大冲击载荷作为激励,用多支点相同激励模型分析轴系的冲击响应,但计算结果偏保守.
The anti-shock performance of the propulsion shafting is one of the decisive factors for the survivability of warship.Due to the interaction between the shafting and the hull structure,the shock loads transmitted to the shafting through different bearings are different.A finite element model of the propulsion shafting is developed for analyzing the dynamic response under different multiple support shock load（MSSL）,and the large mass method is used to solve the model.The characteristic of the dynamic response of propulsion shafting under different and same MSSL are analyzed through numerical simulations.It can be found that the response under different MSSL is between those under maximum and minimum same MSSL generally,and the difference even exceeds 30% at some response points.Therefore,the different MSSL should be taken into consideration in order to obtain a more reasonable result.For simplicity,the response under maximum MSSL can be used to evaluate the anti-shock performance of the propulsion shafting during the engineering design,but the result is conservative.
出处
《武汉理工大学学报（交通科学与工程版）》
2013年第3期566-569,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
冲击
推进轴系
有限元法
舰船
数值仿真
shock
propulsion shafting
finite element method
warship
numerical simulation
