Transient analytical method of vane forcing response under stator-rotor wake influence
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摘要: 对叶片强迫响应问题,提出应用瞬态分析的方法,针对转子叶片在前排静子叶片尾流激振情况下的位移和应力进行预估.流场进行全场三维非定常求解,将三维非定常气动力引入转子叶片有限元结构计算中,对尾流激振情况下叶片强迫响应问题进行瞬态分析,比较了不同转速下叶片的强迫响应,得到响应位移及应力变化的分析结果.采用叶片强迫响应瞬态分析方法,从流场的求解到结构响应的求解均应用成熟的通用软件,为工程应用该方法进行尾流激振情况下叶片振动应力预估及阻尼的研究提供了一个可行的方法.Abstract: Rotor blade forcing response problems due to the wake of front vane row was analyzed. A transient analytical method was presented for blade forcing response. Then displacement and stress could be predicted. The analysis of three-dimension unsteady flow field was performed with NUMECA to provide the wake influence force and the pressure was introduced into calculating structure dynamics(CSD). Structure analysis was performed by finite element package ANSYS using transient analysis type. Force boundary condition was written with ANSYS parametric design language(APDL), a scripting language for ANSYS. The displacement and stress under different rotate speed were calculated. Then compared them with Compbell method. For transient analytical method, whether flow field or structure analysis were both presented with well-rounded software, so it’s easy for using in engineering field.
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Key words:
- wake influence /
- forcing response /
- transient analytical method
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