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Thermal-stress Analysis of Thermal Metal Pretection System and Primary Design of the Brackets

Author: ZhangXue
Tutor: LiangJun
School: Harbin Institute of Technology
Course: Engineering Mechanics
Keywords: metallic thermal protection system(MTPS) thermal-stress-coupled radition-conduction design of bracket FEM
CLC: TK124
Type: Master's thesis
Year: 2010
Downloads: 134
Quote: 0
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Abstract


In this paper, analyzes the thermal protection system MTPS (Metal Thermal Protection System) anti-coupled thermal insulation properties and performance, and support for the preliminary design. MTPS is one of the key technologies for developing reusable launch vehicle(RLV) in the U.S. Compared with the ceramic tiles,a state-of-the-art metallic TPS has more efficient internal insulation,lighter weight,simple structure and quick release fastner system for easier installation and removel. MTPS’s primary role is to restrict access by the external space within the body of the heat flow, and as structural components RLV, its carrying capacity must also be given consideration. This paper therefore MTPS, the finite element method analysis of anti-insulation properties and influence, and its important support structure - support, preliminary design, by the stress, displacement field and so on.The effects of the monomer consumption and initiator and emulsifier concentration on the size of polystyrene microspheres were studied. The results show that the size of polystyrene microspheres decreases with increase in concentration of initiator and emulsifier,and an increase in the monomer consumption will increase the particle size.First,based on the basic principles of heat transfer,heat insulation on the principle of anti-MTPS analysis.The thermal properties of the insulation materials were equivalent; application Swann & Pittman theoretical formula equivalent thermal properties of honeycomb panels and carry out numerical example; application layer and the classical theory of the discrete cellular structure of equivalent 3-layer sandwich continuous materials, intermediate cores using the theoretical formula equivalent modulus, tensile modulus method validation method to measure the accuracy of the theoretical formula. Based on the above basic priciples and methods of three-dimensional model for the establishment of MTPS,uunder the proposed three-dimensional thermal analysis.Using the finite element method, simulation MTPS around the coated metal jacket, the introduction of stents and other cubicle in case of radiation temperature. Thermoelastic coupling from the equation, using sequential coupling method, thermal analysis coupled single MTPS performance. Be on the panel center, the structure side of the load in the whole process of the displacement curve, and the support structure and other important stress load.As support can not load required to optimize the stent design. MTPS structure proposed three options support the design, simulation programs and programs for a three-support form. As the structure of the symmetry, in order to reduce the computation, the establishment of a quarter model simulation. Thermal coupling of different stents in the stress under load conditions are compared to elect a more optimal solution. And propose to further optimize the design support program.

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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