By analysed on vibration theory we knew that the load js a static load in mechanics of materials, when the loaded time is 6-8 times as much than the natural vibration period of the unit of structure.

• 通过振动理论的分析得知；材料力学中静载荷的定量标准是:当加载时间为构件系统的固有振动周期的8倍以上时；这种载荷即可认为是静载荷.