本文選題：統(tǒng)一強(qiáng)度理論 + 侵徹��； 參考：《工程力學(xué)》2017年09期

【摘要】：該文將統(tǒng)一強(qiáng)度理論與巖石材料動力強(qiáng)度依賴應(yīng)變率效應(yīng)的物理模型相結(jié)合,建立了巖石材料在侵徹等動力荷載作用下的率型動態(tài)統(tǒng)一強(qiáng)度準(zhǔn)則�；谛拚耐帘P浮動鎖應(yīng)變模型,考慮應(yīng)變率效應(yīng)、中間主應(yīng)力效應(yīng)、強(qiáng)度準(zhǔn)則差異和彈頭滑動摩擦的影響,推導(dǎo)了土盤整體平均鎖應(yīng)力和整體平均鎖應(yīng)變的表達(dá)式。采用MATLAB數(shù)值計(jì)算軟件和四階Runge-Kutta算法編制計(jì)算程序,求解了中低速(V≤900 m/s)長桿彈侵徹條件下彈體的侵徹深度,研究了侵徹過程中彈體的運(yùn)動規(guī)律及靶體的動態(tài)響應(yīng),分析了各參數(shù)對彈體侵深的影響特性。研究表明:該文計(jì)算方法可以較好地描述整個侵徹過程中彈、靶的動態(tài)響應(yīng),還可以得到一系列基于不同強(qiáng)度準(zhǔn)則的侵徹深度的解析解,有效地預(yù)測彈體侵深的上限值和下限值;中間主應(yīng)力效應(yīng)、強(qiáng)度準(zhǔn)則差異和彈頭滑動摩擦對巖石靶的抗侵徹性能具有重要影響。
[Abstract]:In this paper, the unified strength theory is combined with the physical model of dynamic strength dependent strain rate effect of rock material, and the dynamic unified strength criterion of rock material under the action of penetration and other dynamic loads is established. Based on the modified floating locking strain model of soil disk, considering the effects of strain rate effect, intermediate principal stress effect, difference of strength criterion and sliding friction of warhead, the expressions of global average locking stress and global average locking strain are derived. The numerical calculation software MATLAB and the fourth order Runge-Kutta algorithm are used to calculate the penetration depth of the projectile under the condition of medium and low velocity (V 鈮，

本文編號：2092506