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Pre-testing Analysis of Large Remote Sensing Satellite's Structure

机译:大型遥感卫星结构的预测试分析

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In this paper a case study of satellite FE model pre-testing analysis is reported. The study started with FE model verification using mass properties check, free-free modes check, and one g-load factor check. Then a static analysis of the satellite FE model under the effect of various load cases is introduced. A dynamic analysis of the satellite FE model during launch phase is presented including both modal and harmonic analysis. During the modal analysis, modal effective mass method is used to assign the required mode shapes and the corresponding natural frequencies for modal survey test. The sensors required for dynamic testing are considered located on the master dof's. The amplitude frequency response at these master dof's is calculated during harmonic analysis. The FE model is then reduced using component mode synthesis method in ANSYS. The reduced FE model is validated to the full FE model using frequency deviation error criterion, and modal assurance criterion, showing acceptable correlation values. Finally, the reduced FE model can be considered as the test analysis model and it should be validated to the test results.
机译:本文报道了一种卫星Fe模型预测试分析的案例研究。该研究开始使用Fe Model验证使用质量特性检查,无可用模式检查和一个G负载因子检查。然后,介绍了各种负载壳体效果下卫星FE模型的静态分析。介绍了发射阶段卫星FE模型的动态分析,包括模态和谐波分析。在模态分析期间,模态有效质量方法用于分配所需的模式形状和模态调查测试的相应自然频率。动态测试所需的传感器被认为位于主DOF上。在谐波分析期间计算这些主DOF的幅度频率响应。然后在ANSYS中使用组件模式合成方法减少FE模型。使用频率偏差误差标准和模态保证标准验证了减少的FE模型,以及模态保证标准,显示了可接受的相关值。最后,减少的FE模型可以被认为是测试分析模型,应该验证到测试结果。

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