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一、NCA1396抬升結構2#分段振動時效處理及振動前、后應力檢測

The vibration aging treatment and stress detection of the 2# segment vibration of NCA1396 uplift structure

1、2#分段測點位置（Section 2# observation points)

該分段殘余應力檢測時我們在分段的鋼套附近焊縫上選擇了六個測試點，分別進行了振動前后檢測，檢測位置如圖所示。

The segmented residual stress testing when we near the section steel bushing on the weld chose six test points, respectively before and after the vibration test, the test position as shown.

2、2號分段振動時效處理 (2 section vibration aging treatment)

振動處理時，根據分段焊后形態將激振器的固定位置選擇在分段前側蓋板的角上，二次振動選在前側蓋板的另一角上分別進行了振動處理，位置如圖所示：

Vibration processing, according to section morphology after welding the vibrator fixed location choice in the Angle of the section of the side plate, choose the secondary vibration at the other corner of the front cover board have been dealt with vibration, respectively, on the position as shown:

3、2號分段振動后應力檢測情況

Stress detection and elimination of the stress after section 2 vibration

從振動時效后殘余應力數據上看，平行焊縫方向（σ1）振動前應力水平為 441.16MPa, 振動后應力水平為243.31MPa ，應力變化率為-43.29%。而垂直焊縫方向（σ2）振動前應力水平為 350.16MPa, 振動后應力水平為205.57MPa ，應力變化率為-42.41%。且兩個方向應力明顯趨于均化，達到了國家標準要求。

Vibration aging from residual stress eliminating data parallel direction of weld (sigma 1) before the vibration should stress level for 441.16MPa, vibration should be horizontal force 243.31MPa should force changes in the rate of -43.29%. And perpendicular to the weld direction (sigma 2) before the vibration should be horizontal force 350.16MPa, vibration should be horizontal force 205.57MPa should force changes in the rate of -42.41%. And the two direction stress obviously tends to homogenization, reached the national standard.

二、結  論

1、2#分段振動后的殘余應力降低了-43.29%；

2、從殘余應力的降低率來看上述分段的殘余應力的降低率已   達到和超過了國家行業標準JB/T10375-2002 標準中的要求，此次振動時效處理合格有效。

1,2 # segments after vibration residual stress is reduced by -43.29%;

2, from the residual stress decreases the rate of residual stress decreases the segment rate Meet and exceed national industry standard requirements of JB/T10375-2002 standards, the Vibration aging treatment of qualified and effective.