CAJ | 학술논문

为探讨战斗部近距爆炸下大尺寸叠层薄板的抗爆机理，结合模型试验，采用有限元对近距空爆载荷作用下固支叠层方板的爆炸载荷、变形过程、应变分布和变形吸能情况进行了数值分析，并与相同材料同等总厚度的单层方板进行了比较。在此基础上，进一步分析了层间间距、叠层层数和边界条件对叠层板抗爆性能的影响。结果表明，较单层板而言，试验工况下叠层板的变形吸能较大，但其最大应变较小且应变分布更为均匀；而在极限应变状态下，叠层板变形吸能较单层板有很大提高；适当增大层间间距能一定程度地提高叠层板的抗爆变形能力，但过大的层间间距不利于叠层板的整体协调变形；层数的增加能提高叠层板的抗爆变形能力；简支边界条件较固支边界条件而言，能更充分地发挥叠层板的抗爆变形吸能能力。
위탐토전두부근거폭작하대척촌첩층박판적항폭궤리，결합모형시험，채용유한원대근거공폭재하작용하고지첩층방판적폭작재하、변형과정、응변분포화변형흡능정황진행료수치분석，병여상동재료동등총후도적단층방판진행료비교。재차기출상，진일보분석료층간간거、첩층층수화변계조건대첩층판항폭성능적영향。결과표명，교단층판이언，시험공황하첩층판적변형흡능교대，단기최대응변교소차응변분포경위균균；이재겁한응변상태하，첩층판변형흡능교단층판유흔대제고；괄당증대층간간거능일정정도지제고첩층판적항폭변형능력，단과대적층간간거불리우첩층판적정체협조변형；층수적증가능제고첩층판적항폭변형능력；간지변계조건교고지변계조건이언，능경충분지발휘첩층판적항폭변형흡능능력。
To explore the blast-resistant mechanisms of large-scale multilayered thin plates subjected to close-range explosions of warheads, finite element simulations as well as model tests were carried out. Blast loads, deformation processes, strain distributions and deformation energy absorptions of the clamped multi-layered square plates under close-range air blast loads were numerically analyzed. Comparisons between mul-tilayered plates and single-layer plates of the same materials and equal total thicknesses were conducted. On the basis of the numerical analysises, further investigations into the influences of interlayer spaces, lay-er numbers and boundary conditions on the blast resistances of multilayered plates were performed. The results show that under model test conditions, multilayered plates absorb more deformation energy than their monolithic counterparts, whereas their maximum strains are smaller, and strain distributions are more uniformly than those of the monolithic counterparts. Under ultimate strain conditions, a significant enhance-ment in deformation energy absorptions is obtained for multilayered plates comparing with their monolithic counterparts. Appropriate increase of interlayer spaces leads to a certain extent enhancement in deforma-tion capabilities for multilayered plates, while overlarge interlayer spaces are unfavourable to their overall harmonious deformations. Deformation capabilities of multilayered plates are improved by increasing layer numbers. Comparing with clamped boundary conditions, simple-support boundary conditions are more con-ductive to the adequate exertion of deformation-energy-absorbing capabilities for multilayered plates.