梁系结构在低速冲击下的动力计算方法

Kinetic Calculation Methods of Beam System Under Low Velocity Impact

由于冲击强度和结构强度参数的不同,受力梁和支承梁在低速冲击下可能处于4个不同的应变阶段,根据不同应变阶段的判别条件,提出了相应的计算模型,并推导出了冲击力和梁横向位移的计算公式。通过实例计算表明:当支承构件的柔度很高时,承受冲击梁的总挠度很小;当支承结构的刚度很高时,这个效应在很大程度上消失了。

The bearing beam and the supporting beam under low velocity impact may be at four different strain stages as the parameters of the impact strength and the structure strength are different. According to the distinguishable conditions of different strain stages, the corresponding calculation models were come up, the calculation formulas of the impact force and the beam＇s lateral displacement were deduced. The relevant example shows that when the flexibility of the supporting component is high, the beam＇s total deflection is small; when the stiffness is high, this effect disappears almost.