从位移模态出发详细推导了应变模态的表达式；
The expression of strain modal is derived in detail on the basis of displacement modal.
根据这一原理，运用应变模态数据可以检测出结构的损伤。
According to this principle, the structural damage can be identified using the strain modal datas.
研究了基于应变模态的钢结构构件焊缝损伤的自动识别方法。
The strain mode based approach to identify weld damage in members of steel structure automatically is demonstrated in present paper.
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