以某新型大功率船用汽轮机结构为基础，建立有限元分析模型，利用ABAQUS/Standard求解器计算主汽轮机在平稳运行工况下的应力以及变形情况。以平稳运行工况的刚度矩阵为基础，进行模态分析计算，确保总模态质量不小于分析系统总质量的80%。运用动态设计分析法（DDAM），使用ABAQUS自带的冲击谱响应分析模块对主汽轮机设备进行校核。结果表明：汽轮机抗冲击能力满足GJB1060.1-1991的抗冲击要求，在横向冲击下响应最剧烈，在纵向和垂向载荷作用下的响应相对较小；主汽轮机抗冲击薄弱环节在高压汽轮机挠性板部位，建议采取Q690这种中高强度的材料，保证安全冗余。

Based on the structure of a new type of highpower marine turbine, a finite element analysis model was established. ABAQUS/Standard solver was used to calculate the stress and deformation of the main turbine under stable operating conditions. Based on the stiffness matrix of the results under stable operating conditions, modal analysis and calculation are carried out to ensure that the total modal mass is not less than 80% of the total mass of the analysis system. By using DDAM method, the shock spectrum response analysis module of ABAQUS was used to check the main steam turbine equipment. The results show that: The turbine's impact resistance meets the impact resistance requirements of GJB106.11991, and its response is the most severe under lateral impact, while its response under longitudinal and vertical loads is relatively small; The weak link of the impact resistance of the main steam turbine is in the flexible plate of the highpressure steam turbine. It is suggested to adopt medium and high strength materials such as Q690 to ensure safety redundancy.

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