四川兵工学报
四川兵工學報
사천병공학보
SICHUAN ORDNANCE JOURNAL
2014年
9期
1-4
,共4页
有限元%动力学%大质量法%强度%光学头罩
有限元%動力學%大質量法%彊度%光學頭罩
유한원%동역학%대질량법%강도%광학두조
finite element method%dynamic%great mass method%strength%optical window
位于电视制导炮弹前端的光学头罩是保证弹载摄像头免受气动热影响及成像质量的关键，其在发射过程中承受着复杂的载荷。为了计算得出光学头罩应力值的数值解，校核结构强度，确保膛内阶段稳定性，利用有限元分析软件ANSYS，运用大质量法，建立了光学头罩结构的动力学模型，进行了动力学仿真分析。依据动力学仿真结果，发现了结构应力集中部位，并进行了优化。仿真分析结果表明，优化后的光学头罩结构在膛内始终处于弹形变形阶段，最大等效应力小于材料的强度极限，保证了光学头罩在外界动态载荷作用下的可靠性。
位于電視製導砲彈前耑的光學頭罩是保證彈載攝像頭免受氣動熱影響及成像質量的關鍵，其在髮射過程中承受著複雜的載荷。為瞭計算得齣光學頭罩應力值的數值解，校覈結構彊度，確保膛內階段穩定性，利用有限元分析軟件ANSYS，運用大質量法，建立瞭光學頭罩結構的動力學模型，進行瞭動力學倣真分析。依據動力學倣真結果，髮現瞭結構應力集中部位，併進行瞭優化。倣真分析結果錶明，優化後的光學頭罩結構在膛內始終處于彈形變形階段，最大等效應力小于材料的彊度極限，保證瞭光學頭罩在外界動態載荷作用下的可靠性。
위우전시제도포탄전단적광학두조시보증탄재섭상두면수기동열영향급성상질량적관건，기재발사과정중승수착복잡적재하。위료계산득출광학두조응력치적수치해，교핵결구강도，학보당내계단은정성，이용유한원분석연건ANSYS，운용대질량법，건립료광학두조결구적동역학모형，진행료동역학방진분석。의거동역학방진결과，발현료결구응력집중부위，병진행료우화。방진분석결과표명，우화후적광학두조결구재당내시종처우탄형변형계단，최대등효응력소우재료적강도겁한，보증료광학두조재외계동태재하작용하적가고성。
The optical window that located in the front of TV guided projectile is the key to ensure projec-tile-based camera from the effects of aerodynamic heat and imaging quality,it bears the complex load in the process of firing.In order to get optical window’s numerical stress value,check the structural strength,and ensure the firing process stability.Based on finite element analysis software ANSYS,the dy-namic model of optical window has been established by using great mass method and then the dynamic sim-ulation analysis were worked out.According to the result of analysis,the stress concentration of the struc-ture was found and improved.The result of analysis indicates that the improved structure has always been in the stage of elastic deformation during the firing process,and its maximum stress is less than the ultimate strength of material,which guaranteed the reliability of the optical window under the dynamic loading.
