涡轮盘结构概率设计体系的研究

 基于涡轮盘结构确定性设计流程，将概率设计理念融入设计过程中，发展了涡轮盘结构的概率设计流程，初步建立了涡轮盘结构的概率设计体系。以涡轮盘结构的传统设计流程为基础，提出涡轮盘结构的概率设计准则，并建立了涡轮盘的概率设计流程。以某型航空发动机涡轮盘低循环疲劳失效为例，按照文中建立的概率设计流程，将形状优化设计结果作为初始结构方案完成了涡轮盘的低循环疲劳概率设计。通过与原设计结果对比表明，按照概率设计观点进行涡轮盘的结构设计能够兼顾结构静强度性能和结构强度可靠性，在满足可靠度的前提下降低涡轮盘的质量，有效地提高其设计质量，初步验证了涡轮盘概率设计流程的有效性和可行性。

Research of Probabilistic Design System for Turbine Disk Structure

In this article a probabilistic design system for a gas turbine disk is developed to replace deterministic design methods. The flowchart of the process for probabilistic design is established through investigating the conventional design process to find important design inputs and potential failure modes. A basic frame of probabilistic design involving the design process and design criteria is constructed, in which the probabilistic design criteria are built based on successful conventional design criteria....