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The Dynamics Simulation and Software Design for the Whole-spacecraft Vibration Isolation Platform

Author: CiYongWei
Tutor: FangBo
School: Harbin Institute of Technology
Course: General and Fundamental Mechanics
Keywords: The whole spacecraft isolation Nastran VC Interface Dynamics simulation
CLC: V423.42
Type: Master's thesis
Year: 2010
Downloads: 98
Quote: 0
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Abstract


With the rapid development of the aerospace, aviation technology, the complexity of the spacecraft structure with the space requirements continue to increase, vibration control problems become more and more prominent. The interchangeability of the whole spacecraft isolation system is very strong, can take the same isolator structure for different satellite, only a slight adjustment of the whole spacecraft isolation system parameters to meet the performance requirements. In view of this repetitive work wasted a lot of manpower and resources, in order to meet the needs of customers, which is bound to need to develop a specific software platform for the whole spacecraft isolation, complex, difficult to understand and master MSC.PATRAN command stream background package. Firstly, the establishment of a mathematical model of viscoelastic damping material and viscoelastic material parameters of the experimental measurement method is given, and the establishment of a laboratory with the finite element model of the damping device, applied to the isolator. State analysis, we have established a whole satellite passive vibration isolation platform scale finite element model of the prototype and modal analysis and complex mode by complex modal analysis can calculate the the damping number of pieces in the best isolation effect as well as monolithic area damping, frequency response for optimal damping area analysis, and isolation pass rate before the pass rate for the isolation, concluded that isolator largely reduce the vibration response of the satellite . In this paper, based on the laboratory scale prototype mechanical model established using VC established a whole spacecraft isolation platform on the stream background complex patran command package, user-friendly operation, the user simply input interface corresponding isolator parameter, select the the corresponding satellite as well as the type of analysis, the system can directly call patran modeling, meshing, material element attribute definitions, load and define the type of analysis which in turn calls the NASTRAN finite element calculation. This paper gives some application examples and experimental comparison results show that the frequency error remains within 2% pass rate due to the many unmeasured factors, the error is less than 30%, and the simulation pass rate trends and experimental Therefore, we believe that a good correlation of simulation and experiment. Isolation platform verification, this vibration isolation platform applied to actual satellite, users only need to adjust the parameters of the isolator interface operation then optimize them, we can see from the simulation results to its primary node transfer rate are reduced more than 40% of our isolator the actual satellite certain damping effect, the isolator can also be applied to actual satellite.

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CLC: > Aviation, aerospace > Aerospace ( Astronauts ) > Rocket, the spacecraft structure (overall ) > Spacecraft design and construction of > Satellite > Ministries constructed
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