地下结构模型试验的光学激波管

光学激波管是进行抗爆结构试验研究的一种新型动载设备,它除具有常规激波管的通过电测手段测试试验结构物上一点或多点的应力、应变、速度等力学参数外,其突出的特点是通过光测手段能够拍摄试验结构物在冲击波动压作用下连续变化的过程和被破坏形态的清晰物理图像,进行地下结构的抗爆研究。本文较详细地介绍了用于地下结构抗爆试验研究用的光学激波管设备的构造和测试手段以及设备调试和应用试验的情况,最后还公布了用该设备拍摄到的激波进入通道后波后新物理现象的彩色波动照片及用该设备做的部分试验研究成果。

AN OPTICAL SHOCK WAVE TUBE FOR THE MODEL EXPERIMENTS OF UNDERGROUND STRUCTURES

The optical shock wave tube is a new kind of dynamicequipment for the study of the experiments of underground structuresagainst blast.Like the conventional shock tubes by using electricmeasuring device,it can be used to measure the stresses,strains,veloci-ties and other mechanical parameters at one point or more points onthe experimental structure.Its prominent aduantage is that it can takeclear photographs showing the continuous changing process and themode of failure of the structures under the pressure of shock wave,which can be used to deal with the underground structures againstblast.In this paper,we will introduce in detail the construction of opti-cal shock tube and the corresponding measuring method for the experi-ments of underground structures against blast.We will also describethe tests of the equipment and its applications.Finally,a color wave-motion photo obtained by use of this equipment is provided showingthe new phenomenons after the shock wave enters the channel and par-tial experimental results are also given.