The Dynamic Performance Analysis Of Dark Matter Silicon Array Detector

The primary scientific objectives of dark matter particle detection satellites arelooking for dark matter particles. Dark matter particle detection satellites is consisted bythe plastic array detectors, silicon array detectors(STK), BGO calorimeter and neutrondetectors. As the satellite payload, dark matter particles detect satellite must undergo a testto the launch process.During the launch process, The satellite should bear inertial force, aswell as sine and random vibration. So,STK should have sufficient stiffness, strength andexcellent dynamic performance.STK is the largest and most complex space probe systemin china currently.It is too complicated to analysis by theoretical calculations. Therefore,the finite element analysis(FEA) and experiment analysis have been used to design thestructure.During the study,we use Inventor and Ansys to establish several FEA program,tofinish FEA of all conditions and modify the structure of STK. First,a single-layerhoneycomb panel has been studied. Finite element analysis and vibration test method havebeen used for the study about how to establish the finite element model of single-layerhoneycomb panel.Using the simplified scheme when create the entire size honeycombpanel.Using FEA method to select the material of sheet and the support structure based onthe composite failure criteria.The static analysis and modal analysis of entire sizehoneycomb panel has been finished based on the environmental simulation experimentconditions.Assessed the design of entire size honeycomb panels.Based on the study offinite model of honeycomb panels,finished the model of STK.The static analysis, modalanalysis, sine vibration analysis and random vibration analysis of STK has beencompleted.Take part in the vibration test of preliminary STK.Compare the FEA results andtest results.Assessed the design of preliminary STK.Based on the assessed results ofpreliminary STK, provided3modify design scheme of single-layer honeycombpanel.Compared3modify program by FEA method.Completed the static analysis andmodal analysis of modified STK.Assessed the mechanical properties and dynamiccharacteristics of modified STK.After research, obtained the simplified honeycomb panelsmodeling program whose modal results is very closed to the modal results of honeycombpanels with actual shape of the honeycomb core, and the results of vibration test.Combined with the finite element method and actual product processing,we choose thematerial of sheet and support structure. Provided the design scheme of STK which meet the strength, stiffness and dynamic performance requirements. The results of the paperprovide a theoretical basis for further product improvement and the research work has astrong theoretical and practical value.