Strain modal test is applied to diagnosing the position and degree of structural damage, in consideration of the displacement modal parameters being insensitive to damage.
针对位移模态参数对结构损伤欠敏感，应用应变模态试验技术诊断结构损伤位置和程度。
In order to ensure structural safety in the design working life, it is necessary to carry out integrity analysis of fatigue and to evaluate the degree of fatigue damage on the structure.
为了保证结构在设计寿命期内的安全使用，有必要对结构进行整体疲劳分析，评估其在设计年限内的疲劳损伤程度。
Under the same conditions of structural-material complex, fracture system, and mining scale, the ground damage degree is related to the tectonic stress field.
在构造介质、构造界面特征相似，开采强度也相同的条件下，煤矿区采动损害与其所处的构造应力场性质有关。
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