无垫圈螺栓连接系统优化设计和泄漏率预测

Lightweight optimal design model and leakage prediction for bolted joint systems without gaskets

无垫圈螺栓连接系统的优化设计和泄漏率预测是燃气轮机、航空发动机等领域的重要研究方向,而现行的大多数螺栓连接设计标准都不是基于密封性考量的,领域内也没有合理的泄漏率评估方法。本文总结了造成这些研究困难的主要限制因素,并在此基础上,介绍了国内外学者为了突破这些难点而做的一系列工作。最后,本文着重介绍了最近Ma等人提出的无垫圈螺栓连接系统优化设计的理论模型,和基于粗糙渗透理论的泄漏率预测方法。

Bolted joint systems without gaskets are widely employed in the fields of gas turbine and aero-engine. But most of the worldwide design standards about the joint systems of this type are still not compiled based on its sealing performance, and the corresponding leakage rate estimation is also ambiguous. In this paper, the major factors that limit the research in this direction are summarized, and the studies in the literature about these limiting factors are briefly reviewed. Finally, the recent work by Ma et al. about a theoretical model for the lightweight design of bolted joint system without gaskets, and the corresponding leakage prediction based on the penetration theory are recommended.