中文摘要：

为了精确分析轴系运行工况下的动态响应特性,应用有限元技术与多体动力学理论对船用6300C型柴油机轴系的动态特性进行了研究。首先建立柴油机轴系各零部件的刚体模型,利用ANSYS软件对曲轴、连杆进行柔性化处理,运用ADAMS软件重新建立轴系刚柔混合的多体动力学模型,采用安全系数法对连杆进行强度校核。结果表明,相比于刚体模型,采用非线性多体动力学方法可以获得更接近实际的动态载荷边界条件,计算所得连杆的安全系数为1.9,强度满足工作要求。

英文摘要：

The dynamic characteristics of a crankshaft was studied in a 6300C marine diesel engine by a finite ele-ment method and multi-body dynamics theory in order to accurately analyze the dynamic response characteristics in operating conditions. The rigid models of components and parts were built, the flexible treatment of crankshaft and link rod was executed using ANSYS software, the rigid-flexible hybrid model was reconstructed using ADAMS soft- ware, and the intensity of connecting rod was checked using the safety coefficient method. The analysis showed that there was more accurately dynamic load boundary conditions in multi-body dynamics method compared with rigid model, with calculated connecting rod safety coefficient of 1.9, and in the multi- body dynamics method the strength met the requirement.