CAJ | 학술논문

离心模型试验中由于采用的模型箱尺寸有限,无法满足原位试验的半无限体要求,由此而形成边界效应问题,爆炸离心试验中此问题尤为突出.为比选边界材料,依托清华大学50 g-t土工离心机,进行了数次爆炸离心模型试验,通过加速度场分析,选择较合适的边界材料.最后通过试验确定,在50 g离心加速度2.5 g炸药爆炸离心模型试验中,边界上加入该边界材料后,离爆心20 cm内的试验成果可以接受.
리심모형시험중유우채용적모형상척촌유한,무법만족원위시험적반무한체요구,유차이형성변계효응문제,폭작리심시험중차문제우위돌출.위비선변계재료,의탁청화대학50 g-t토공리심궤,진행료수차폭작리심모형시험,통과가속도장분석,선택교합괄적변계재료.최후통과시험학정,재50 g리심가속도2.5 g작약폭작리심모형시험중,변계상가입해변계재료후,리폭심20 cm내적시험성과가이접수.
Due to the limited size of model box,the centrifuge model can′t meet the requirement of semi-infinite body in situ experiment,which forms the boundary effects. This problem is especially prominent in blast centrifuge modeling. Relying on Tsinghua University 50 g-t geotechnical centrifuge,several blast centrifuge model tests have been done to select appropriate boundary material by analyzing the accelerating field. The results within 20 cm from the explosion center can be accepted under the conditions of acceleration 50 g,explosion 2.5 g after adding the material in boundary.