Optimization And Study On Damping For The Bracket Of Instrument Cabin Of Missile

The instrument cabin in the missile upper stage, it usually locates between themissile rocket engine and the payload (such as satellite), is one of the effectiveloads among the above grades structures, playing the important role of supportingand connection equipments. Therefore, ensure the structure strength, reduce thestructural weight of apparatus cabin, and avoid the negative influences ofinstrument cabin structure caused by external have become one of the hottest spot inthe field of structure design.First of all, this paper is going to research and analyse on the current situtationaround the world. The main content of this paper includes: firstly, researchinginstrument cabin structure lightweight, putting forward three kinds of basic methodsof lightweight: using new lightweight materials, optimizing the structure size, andimproving the structure and layout; Secondly, the basic method of the vibrationisolation technology analyzed the charateristics and the applied range the passivevibration isolation, and the integration of the passive and the active vibrationisolation; Thirdly, the physical characteristics and damping characteristics of metalrubber damper, which lay the foundation for the mathematical modeling of shockabsorber;Then this paper will develop the point that how to establish the multi-bodydynamics model of apparatus cabin structure. Dynamic equations of cabin vibrationsystem model, which is based on the Darren Bell principle, analyzes the influenceson the damping efficiency caused by these three following factors: the mode ofvibration, the theory of shock absorber apparatus cabin structure vibration, andvibration damper stiffness, damping and external excitation frequency.Additionally, the structure of the instrument module support will be redesignedin this paper, for the purpose of the structure optimization. Trying to understand andacquire the basic principle of optimization and sequential quadratic programming;then, the mathematical optimized model of the apparatus cabin bracket will beestablished and studied, in order to obtain the concrete structure drawing instrumentmodule supportFinally, some dynamic simulation analysis of the cabin structure design in theAnsys Workbench environment will be provided at the end of this paper. This part isdivided into3parts: first of all, the structure strength check of the apparatus cabinbracket after optimization, the optimized structure meet the requirement ofengineering application; secondly, modal analysis of the apparatus cabin bracket,lay the foundation for dynamic simulation; finally, analysis of damping performanceof damper, and compared with the theoretical value, verify the vibration damper with damping ability is allowed in the range of the external vibration frequency.