【摘要】 空间遥感器在发射过程中要经历复杂恶劣的力学环境,为保证遥感器具有高可靠性,必须具有足够的动力学刚度。在利用有限元软件进行动态特性工程分析时,常因对结构中连接环节的简化不当而导致计算结果偏差较大。将经典的接触理论应用到空间遥感器的动力学有限元分析中,首先分析遥感器连接部分的接触情况,然后在有限元建模中模拟出这种接触情况,求得结构的固有频率。振动试验表明,这种方法能够比较真实地模拟出结构的固有动态特性。更多还原

【Abstract】 Because of the rigorous dynamic environment in launch of space remote sensor,it’s very important for remote sensor to have adequate dynamic stiffness for enough reliability.But in the process of engineering analysis with FEM,biggish error is resulted from the unsuitable simplification for connecting parts.The classical contact theory is applied in dynamic FEA of a space remote sensor.Based on the analysis of contact states,the sensor’s FEM(Finite Element Model)is founded to calculate modal.The vibration test is carried out.Results showed that calculated frequencies are coincided with those from test,so structural dynamic stiffness is simulated preferably.更多还原