【摘要】：從機械結(jié)構(gòu)角度對機械夾持狀態(tài)下吸收了高能激光束能量的磷酸二氫鉀(KDP)晶體內(nèi)部產(chǎn)生熱應(yīng)力的問題進行了研究。理論分析了KDP晶體吸收激光能量引起的溫升,研究了機械夾持狀態(tài)下KDP晶體內(nèi)部熱應(yīng)力的生成機理。采用有限元方法對KDP晶體的溫度分布和熱應(yīng)力分布進行了仿真計算,分析了夾持裝置結(jié)構(gòu)參數(shù)、預(yù)緊力、摩擦系數(shù)和彈性模量對熱應(yīng)力的影響。結(jié)果表明,夾持裝置對KDP晶體的機械夾持作用是KDP晶體內(nèi)部產(chǎn)生熱應(yīng)力的重要因素,熱應(yīng)力的大小與夾持裝置的結(jié)構(gòu)參數(shù)有關(guān)。
[Abstract]:The thermal stress in potassium dihydrogen phosphate (KDP) crystal which absorbs the energy of high energy laser beam under mechanical clamping state is studied from the mechanical structure point of view. The temperature rise caused by the absorption of laser energy in KDP crystal is analyzed theoretically. The formation mechanism of thermal stress in KDP crystal under mechanical clamping is studied. The temperature distribution and thermal stress distribution of KDP crystal were simulated by finite element method, and the influence of structure parameters, pretension force, friction coefficient and elastic modulus on thermal stress was analyzed. The results show that the mechanical clamping effect of the clamping device on the KDP crystal is an important factor in the thermal stress generation in the KDP crystal, and the magnitude of the thermal stress is related to the structure parameters of the clamping device.
【作者單位】： 中國工程物理研究院總體工程研究所;
【基金】：國家高技術(shù)研究發(fā)展計劃(2007AA804217)
【分類號】：O614.113

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