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首页> 外文期刊>Journal of Aerospace Sciences and Technologies >FORCE DISTRIBUTION AT INDETERMINATE STRUCTURAL INTERFACES OF LARGE ELEMENTS OF SPACECRAFT
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FORCE DISTRIBUTION AT INDETERMINATE STRUCTURAL INTERFACES OF LARGE ELEMENTS OF SPACECRAFT

机译：空间元素不确定结构界面处的力分布

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Spacecraft is an assemblage of several elements and many of these elements have statically indeterminate interfaces. The distribution of forces at their interfaces depends on the stiffness at these interfaces. It is expected that the forces at the interface of a subsystem are significant in regions that are relatively stiff. It is shown here that this behavior is true when the force acts only on the specific subsystem and no forces act on the rest of the elements. If the forces act on the entire system the force distribution at the interface of a subsystem is significantly modified by the deformation at these interfaces which are caused due to the forces acting on the rest of the elements. The forces can be significant even at locations where the stiffness is low. These characteristics are concluded using a spring-mass model. Using the results of finite element model these findings are then demonstrated for the forces at the interfaces of a propellant tank mounted in a spacecraft. Similar characteristics of force distribution are seen in the natural modes of vibration. Experimental results are obtained and they show good agreement with the above findings.
机译：航天器是几个元素的集合，其中许多元素具有静态不确定的接口。力在其界面处的分布取决于这些界面处的刚度。可以预期，在相对较硬的区域中，子系统接口处的作用力会很大。此处显示出，当力仅作用于特定的子系统而没有力作用于其余元素时，此行为是正确的。如果力作用在整个系统上，则子系统的界面处的力分布会由于这些界面处的变形而显着改变，这是由于作用在其余元件上的力引起的。即使在刚度较低的位置，力也可能很大。这些特征是使用弹簧质量模型得出的。然后使用有限元模型的结果证明了这些发现，证明了安装在航天器中的推进剂储罐界面处的力。在自然振动模式中可以看到类似的力分布特征。获得了实验结果，它们与上述发现很好地吻合。

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