Load spectra are important basis on which the classification of cranes, the experimental study of fatigue limit of the crane framework, and the evaluation of its lifelimit are based.
载荷谱是起重机分级、结构疲劳强度试验研究和寿命估算的重要依据。
2
According to the service lifelimit of stone room and surrounding rock, the circumstances of bearing force are analyzed. On basis combination arch theories, the support parameters are computed.