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采用通用有限元软件ANSYS建立了某火箭动力系统试验台承力架有限元模型,分析了该承力架在试验状态和试验准备状态下的应力分布,根据应力分析结果对承力梁的结构和布局作了相应优化,使结构强度满足工作要求。同时对局部结构——承力环支腿进行了应力分析和优化。最后分析了承力架的自身模态,其轴向一阶振型在试验件轴向一阶振型范围内,需进一步采取措施以避免共振。
A general finite element software ANSYS was used to establish a finite element model of the bearing system of a rocket power system test bed. The stress distribution of the bearing frame under test condition and test preparation condition was analyzed. Based on the stress analysis results, The layout has been optimized accordingly so that the structural strength meets the job requirements. At the same time, the stress analysis and optimization of the local structure - bearing ring legs were carried out. Finally, the self-mode of the bearing frame is analyzed. The first-order axial mode of the bearing frame is within the range of the first-order mode of the axial direction of the test piece, and further measures need to be taken to avoid the resonance.