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符号表C=恒应力下的比热θ=由热弹性效应引起的表面温度变化P、Q=表面主应力f=试验结构的振动频率K_(?)=试验结构材料的热弹性系数(a_L/ρC_(?))t_p=零件/试件的厚度T=试验结构的绝对温度a_L=试验结构材料的线膨胀系数a_p=试验结构材料的热量扩散率ξ=试验结构的表面热辐射率σ=斯蒂芬(Stefan)常数ρ=材料的密度SPATE=热辐射应力图形分析仪,专指由英国科学仪器研究协会(SIRA)/Omotron 公司为进行热弹性应力分析专门设计制造的硬件热弹性应力分析(TSA)技术已应用于多种承受振动响应的航空发动机材料试件和零件。与传统的技术相比,它可较快地获得全场应力信息。本文讨论在振动频率范围内对 SPATE 系统/材料进行校准的方法、研究热传导引起的效应,并叙述对 RB211风扇叶片的应用。
Symbol table C = specific heat at constant stress θ = surface temperature change due to thermoelastic effect P, Q = principal surface stress f = vibration frequency of test structure K _ (?) = Coefficient of thermal elasticity of test structure material (a_L / ρC _ (?)) t_p = thickness of the part / specimen T = absolute temperature of the test structure a_L = coefficient of thermal expansion of the test structure material a_p = thermal diffusivity of the test structure material ξ = surface emissivity of the test structure σ = Stefan Constant ρ = Density of Material SPATE = Thermal Radiation Stress Graph Analyzer, specifically refers to the hardware thermo-elastic stress analysis (TSA) specially designed and manufactured by SIRA / Omotron for thermoelastic stress analysis. Technology has been applied to a variety of vibration-tolerant aeroengine material specimens and parts. Compared with the traditional technology, it can quickly obtain the full field of stress information. This article discusses ways to calibrate a SPATE system / material in the vibration frequency range, studies the effects of heat conduction, and describes the application of RB211 fan blades.