Weld design of TC17 titanium alloy blade test component by linear friction welding
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摘要: 基于Goodman曲线，结合稳态应力分析和模态分析结果，文中提出了一种判断叶片振动危险点的方法。基于该方法，文中分析了TC17钛合金线性摩擦焊接叶片单元件的焊缝高度和焊接夹角对叶片振动安全的影响。此外，对于该叶片单元件在1阶弯曲模态和1阶扭转模态下焊缝高度和焊接角度对叶片振动安全的影响也进行了分析。分析结果表明，对于某线性摩擦焊接叶片单元件1阶模态，叶片焊接夹角和焊缝高度对叶片振动安全性的影响均达29%以上，而对于1阶扭转振动安全性，焊接夹角和焊缝高度的影响则分别达到了227%和392%。通过1阶弯曲和1阶扭转模态下的线性摩擦焊缝影响分析，获得了某TC17钛合金线性摩擦焊接叶片单元件焊缝的合适位置。Abstract: Based on Goodman diagram and combined with the results of steady-state stress analysis and modal analysis, a method of assessing weak position of blade vibration was put forward in the paper. Based on the method, effects of weld height and welding angle of TC17 titanium alloy blade test component on blade vibration safety was analyzed in the paper. Besides, effects of weld height and welding angle on the vibration safety of the blade element in the first order bending mode and the first order torsion mode were also analyzed. The analysis results showed that for the first order bending mode of blade test component by linear friction welding, effects of blade welding angle and weld height on the vibration safety of blade were more than 29%, while for the first order torsion vibration safety, effects of welding angle and weld height are 227%and 392%, respectively. By analyzing effects of linear friction welds in the first order bending mode and torsion mode, the suitable welding position of TC17 titanium alloy blade test component by linear friction welding was obtained.
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Keywords:
- TC17 titanium alloy /
- blade /
- linear friction welding /
- weld height /
- welding angle
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