Abstract
In order to simplify the calculation of random vibration fatigue of welded pipe, this paper proves that the structural stress referred to by structural stress method in welding fatigue analysis is consistent with the nominal stress calculated by material mechanics, and a simplified method for rapid design and fatigue analysis is proposed, which is not only independent of FE-Safe software, but also takes advantage of the efficiency of beam element model. In addition, based on the random vibration calculation results of the beam element model, the effects of the multi-scheme arrangement of damping clamps on the welding fatigue life of the structure are discussed. It is considered that the scattered clamps and the increased number can effectively avoid the resonance frequency of the structure, but it does not necessarily improve the fatigue life of the welding, and may even accelerate the failure of the welding position. The specific layout design needs to combine the fatigue calculation results.
| Translated title of the contribution | Fatigue Analysis of Small-Diameter Welded Pipe in Liquid Rocket Engine |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1628-1635 |
| Number of pages | 8 |
| Journal | Tuijin Jishu/Journal of Propulsion Technology |
| Volume | 42 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 2021 |