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目的采用计算机仿真的方法,对某航天产品结构的动态特性进行研究,并提出提高该产品局部刚度的修改设计方案。方法用MSC.Patran对产品结构建立有限元模型,用MSC.Nastran计算产品结构的固有振动模态,结合实际振动试验结果,验证了仿真计算的准确性。结果分析产品结构耐航天振动环境的能力,在满足产品功能要求的前提下,提出两个可行的提高局部刚度的修改设计方案,通过对两个修改结构方案进行仿真计算,对修改后的结构动态特性进行了预测。结论提高某航天产品局部刚度的仿真研究,为该产品的修改设计提供了理论指导,这一技术方法可作为航天产品耐振动环境设计的技术手段。
Objective To study the dynamic characteristics of a space product structure by computer simulation and propose a modified design scheme to improve the local stiffness of the product. Method MSC.Patran finite element model of the product structure, with MSC.Nastran product structure inherent vibration mode, combined with the actual vibration test results verify the accuracy of the simulation. Results Based on the analysis of the ability of the product structure to resist the vibration environment of the spacecraft, two feasible design schemes to improve the local stiffness were put forward on the premise of meeting the functional requirements of the products. By simulating the two modified structure schemes, The characteristics were predicted. Conclusion The simulation research on improving the local stiffness of a space product provides the theoretical guidance for the modification and design of this product. This method can be used as a technical means to design a vibration-resistant environment for aerospace products.