用于柱形爆炸容器周向大变形历程测量的应变丝技术

摘要

为了测量柱形爆炸容器的动态周向大变形历程,开发了应变丝测量技术.选用性能良好的合金丝沿爆炸容器周向固定,容器膨胀变形驱动合金丝同步伸长,配合适当的电路,检测合金丝的电阻变化,从而获得容器的变形历程.在钢筒的中心进行了120 g TNT当量球形装药下的爆炸加载实验,获得了峰值超过20％的钢筒周向变形历程.测量结果与实验后钢筒变形实测结果及数值模拟结果吻合较好.%In the present work we developed a strain wire measurement technique that can be used to measure the dynamic deformation process of cylindrical explosion vessels.The strain wires,compactly fixed along the circumference of the explosion vessels,extended synchronously when the vessels deformed due to the wires' good ductility.Coupled to appropriate circuitry,the resistance profiles of the alloy wires were measured to determine the dynamic deformation process of the explosion vessels.A 120 g TNT spherical high explosive experiment was performed in a cylindrical steel shell.The circumferential deformation curve of the shell was obtained,the peak value of which exceeded by 20％.The result of the strain wires measurement accorded with both the simulation result and the deformation data from the cylindrical steel shell experiment.