CAJ | 학술논문

应用 LS-DYNA 有限元程序建立2，4，6-三硝基甲苯（TNT）炸药爆炸的数值模型并进行空爆数值计算，结合常用的经验公式，验证计算模型及参数取值的可信性。基于以上研究，提出冲击波超压修正计算方法，以各经验公式加权平均值作为参考，对数值模拟结果进行修正。结果表明：早期常用的经验公式与数值模拟计算结果分别处于爆炸冲击波超压的中下位值及下限值，均存在低估爆炸冲击波的危险。通过修正计算方法修正后的冲击波超压，可以作为爆炸冲击波超压的中位值。
응용 LS-DYNA 유한원정서건립2，4，6-삼초기갑분（TNT）작약폭작적수치모형병진행공폭수치계산，결합상용적경험공식，험증계산모형급삼수취치적가신성。기우이상연구，제출충격파초압수정계산방법，이각경험공식가권평균치작위삼고，대수치모의결과진행수정。결과표명：조기상용적경험공식여수치모의계산결과분별처우폭작충격파초압적중하위치급하한치，균존재저고폭작충격파적위험。통과수정계산방법수정후적충격파초압，가이작위폭작충격파초압적중위치。
The finite element model of TNT explosion was carried out by LS-DYNA,then the numerical results of air explosion were obtained.Comparing to the empirical formulae,the credibility of the calculation model and parameter se-lection was verified.On the basis of analysis results,the modified calculation method of the shock wave overpressure was proposed,in reference to the weighted average of the empirical formulae,the results of numerical simulation were modi-fied.The research results show that:the common empirical formulae used before and the numerical simulation are in the lower median value and the lower limit value of the blast shock wave overpressure respectively,the risk of the blast shock wave overpressure are likely to be underestimated,but the modified shock wave overpressure based on the modified calcu-lation method could be used as the median value of the blast shock wave overpressure.