本文選題：爆破破冰 + 爆炸沖擊波��； 參考：《爆破》2017年02期

【摘要】：利用動力分析軟件ANSYS/LS-DYNA模擬研究水下爆破破冰過程中爆炸沖擊波壓力的作用特征和傳播規(guī)律,對比分析在冰體覆蓋的相對封閉條件和常規(guī)水下爆炸時水中壓力變化的差異性。研究表明:爆炸沖擊波產(chǎn)生的水壓力以炸藥為中心向四周傳播,對冰面破碎起主要作用,被擾動冰體主要發(fā)生振動折裂。炸藥周圍近區(qū)壓力初始峰值大體上相同,爆源遠區(qū)相差較大,冰蓋的存在減弱了爆破能量的耗散。對于相同集中藥包,入水深度直接影響爆破破冰效果。和常規(guī)水下爆炸相比,在冰體覆蓋的相對封閉條件下水中峰值壓力較小,衰減速度較慢。
[Abstract]:The dynamic analysis software ANSYS / LS-DYNA was used to simulate the action characteristics and propagation law of blast shock wave pressure during underwater blasting ice breaking. The difference of pressure variation in water during underwater explosion was compared between the relative closure conditions of ice cover and the conventional underwater explosion. The results show that the water pressure produced by explosion shock wave propagates around the center of explosive, which plays a major role in breaking the ice surface, and the disturbed ice body mainly occurs vibration fracture. The initial peak value of the near region pressure around the explosive is roughly the same, and the far region of the explosion source is quite different, and the energy dissipation of the blasting is weakened by the existence of the ice sheet. For the same traditional Chinese medicine bag, the depth of water entry directly affects the blasting ice breaking effect. Compared with conventional underwater explosion, the peak pressure in water is lower and the attenuation rate is slower under the condition of ice cover.
【作者單位】： 遼寧工業(yè)大學(xué)土木建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(11302094) 遼寧省科技廳聯(lián)合基金項目(SY2016003) 遼寧省高等學(xué)校優(yōu)秀人才支持計劃項目(LJQ2014063)
【分類號】：TV542.5;TV875

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