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根据薄板弯曲自由振动理论 ,用振动法测定了 HP- Nb服役材料和未服役材料的弹性模量 ,据此确定了炉管蠕变损伤沿径向的分布状况。
According to the bending vibration theory of thin plate, the elastic modulus of HP-Nb service material and unserviceable material was measured by vibration method, and the radial distribution of creep damage was determined.