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利用大型通用有限元软件对大型固体发动机壳体的焊接过程及几种不同热处理工艺进行了模拟。结果表明,焊态下壳体的应力主要集中在电缆座的角焊缝处,应力水平较高。退火热处理结果显示,随着退火温度的升高和出炉温度的降低,退火后壳体电缆座附近的峰值等效应力明显减小,当退火保温温度为700~730℃,退火出炉温度为350~400℃时,能最大限度地降低电缆座残余应力,减小裂纹倾向。
The large common finite element software was used to simulate the welding process and several different heat treatment processes of the large solid engine case. The results show that the stress in the welded shell is mainly concentrated in the fillet welds of the cable seat, and the stress level is high. Annealing heat treatment results show that with the annealing temperature increases and the tapping temperature decreases, the peak equivalent stress of the cable housing near the housing after annealing is significantly reduced. When the annealing temperature is 700 ~ 730 ℃, the annealing temperature is 350 ~ 400 ℃, can minimize the cable seat residual stress and reduce the tendency of cracks.