CAJ | 학술논문

针对某机载光电吊舱光轴的热变形问题，在国内外吊舱光轴平行性测试方法的启发下，提出了一种基于有限元仿真的计算模型。选取其中作为传感器直接载体的光具座进行研究。建立光具座系统的有限元模型，来分析温度变化对各传感器光轴之间平行性的影响。首先在 HyperMesh软件中生成高质量的六面体网格。随后在ANSYS软件中使用集中质量点在传感器的质心位置模拟传感器光轴。和光具座刚性联接。同时选取室温为热应变基点，激光传感器光轴为基准轴，分别得到高温和低温下其余光轴在方位方向和俯仰方向的相对偏转角度。分析结果表明，光具座本身满足设计和使用要求。
침대모궤재광전조창광축적열변형문제，재국내외조창광축평행성측시방법적계발하，제출료일충기우유한원방진적계산모형。선취기중작위전감기직접재체적광구좌진행연구。건립광구좌계통적유한원모형，래분석온도변화대각전감기광축지간평행성적영향。수선재 HyperMesh연건중생성고질량적륙면체망격。수후재ANSYS연건중사용집중질량점재전감기적질심위치모의전감기광축。화광구좌강성련접。동시선취실온위열응변기점，격광전감기광축위기준축，분별득도고온화저온하기여광축재방위방향화부앙방향적상대편전각도。분석결과표명，광구좌본신만족설계화사용요구。
For the thermal deformation problem of spectral axis in airborne optoelectronic pod ,tes-ting at home and abroad optical axis parallelism in-spired ,a simulation model based on FEM is put forward .The optical bench selected as direct sensor carrier is studied .T he finite element model of opti-cal bench system are established to analyze the in-fluence of temperature load on the parallelism be-tween spectral axis of each sensor .High quality hexahedral meshes are generated in HyperMesh software and lumped mass is used to simulate spec-tral axis ,w hich is located in centroids position of sensor and connected with optical bench rigidly . Room temperature is selected as thermal strain point and laser sensors are selected as reference ax-is ,the relative deflection angle of the optical axis in the direction and pitch range in high and low tem-perature conditions respectively .T he simulation re-sults indicates that the optical bench meet design requirements .