Thermal-Acoustic Analysis of a Metallic Integrated Thermal Protection System Structure

Behnke, marlana N.; Sharma, Anurag; Przekop, Adam; Rizzi, Stephen A.

doi:10.2514/6.2010-3121

Cited by 17 publications

(9 citation statements)

References 6 publications

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“…The impact resistance was listed and the effect of the impact crushes on the vibration characteristics was discussed. Behnke [11] investigated the response of a representative integrated thermal protection system structure under combined thermal, aerodynamic pressure, and acoustic loading. Accurate dynamic analysis model and vibration characteristics calculation provide a sound basis for vibration control and response estimation.…”

Section: Introductionmentioning

confidence: 99%

Thermal vibration characteristics of fiber-reinforced mullite sandwich structure with ceramic foams core

Zhang

Bai

et al. 2015

Composite Structures

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Section: Introductionmentioning

confidence: 99%

Thermal vibration characteristics of fiber-reinforced mullite sandwich structure with ceramic foams core

Zhang

Bai

et al. 2015

Composite Structures

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“…Responses of complex structures in combined environment have been analyzed with numerical simulations [7,8] to predict the behaviors under different factors. Studies of typical structures have also been carried out numerically and analytically to reveal the mechanism.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations on dynamic and acoustic responses of a thermal post-buckled plate

Geng

Wang

et al. 2015

Sci. China Technol. Sci.

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Experiments were carried out for a clamped rectangular aluminum plate to study the dynamic and acoustic behaviors in both pre-and post-buckling ranges under thermal loads. Plate temperature was elevated from ambient value to the level above the theoretical critical buckling temperature of the plate. In the whole test temperature range, the measured frequencies decreased to the minimum values in sequence, and then turned to increase as temperature rose. The softening effect of thermal stresses played the leading role in the decreasing stage and the stiffening effect of thermal buckling deflection became the major influence factor in the increasing stage. The later one could drive the temperature equilibrium point of the heated plate to move towards lower temperature range. All the frequencies would not drop to zero due to the inherent initial deflection which provides additional stiffness to the plate. Dynamic responses state two variation trends in different temperature ranges, shifting toward the lower frequency range and closing up in the mid-frequency range. The characters of spectrum responses changed gradually as the temperature was elevated. Numerical simulations gave predictions with same variation trend as the test results. thermal post-buckled plate, modal test, dynamic response test, numerical simulation Citation: Geng Q, Wang D, Liu Y, et al. Experimental and numerical investigations on dynamic and acoustic responses of a thermal post-buckled plate. Sci

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“…The equation of motion of free vibration for ceramic insulator-strain isolating pad system can be written as follows: [19]:…”

Section: Theory Of Non Linear Vibrationmentioning

confidence: 99%

Vibration characteristics of thermal insulation tile with material and geometric nonlinear effects

Zhao

Xia

Shen

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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The effect of temperature, static load and electron beam irradiation on the deformation of linear polymers A I Kupchishin, M N Niyazov, N A Voronova et al. -Multiscale nonlinear frequency response analysis of single-layered graphene sheet under impulse and harmonic excitation using the atomistic finite element method Sachin O Gajbhiye and S P Singh Abstract. Thermal protection system (TPS) composed of ceramic insulation tile and strain-isolation pad (SIP) tends to be destroyed by excessive inner strain arises from aerodynamic load or substructure deformation/vibration. Both material nonlinearity and geometric nonlinearity affect the static and dynamic strength of TPS, and the nonlinear effects of SIP need to be considered in the strength analysis. By considering both the material nonlinearity and geometric nonlinearity of SIP, the effect of external static load on the dynamic characteristics of tile-SIP system is investigated. Firstly, a theoretical model is established to calculate the natural frequency of tiles under static load with material and geometric nonlinearities. The analysis procedure is separated into two steps. The first step is the nonlinear analysis to determine the static large deformation. The second step is the linearized dynamic analysis on the base of static deformation with small vibration amplitude assumption. The complexity is reduced by introducing a nonlinear coefficient parameter. The theoretical results have good agreement with COMSOL simulation. Numerical results show that large deformation is found in the flexible SIP when uniform static load applied on the surface of the tile, which introduces significant material and geometric nonlinearities and changes the dynamic characteristics of the tile. 9% increase of intrinsic frequency is found for the static load of 80kPa when considering material nonlinearity, while 16% increase of intrinsic frequency is found when considering both material and geometric nonlinearities. It is concluded that the uniform static load has important effect on the nature frequency of tile-SIP systems when introducing the material and geometric nonlinearities into the calculation. The nonlinearities of the SIP need to be considered in the tile-SIP dynamic strength analysis.

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Thermal-Acoustic Analysis of a Metallic Integrated Thermal Protection System Structure

Cited by 17 publications

References 6 publications

Thermal vibration characteristics of fiber-reinforced mullite sandwich structure with ceramic foams core

Thermal vibration characteristics of fiber-reinforced mullite sandwich structure with ceramic foams core

Experimental and numerical investigations on dynamic and acoustic responses of a thermal post-buckled plate

Vibration characteristics of thermal insulation tile with material and geometric nonlinear effects

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