| 刘爽,沙云东.热流环境下薄壁连接结构随机振动响应数值计算[J].装备环境工程,2025,22(3):53-61. LIU Shuang,SHA Yundong.Random Vibration Response Numerical Calculation of Thin-walled Connection Structures under Heat Flux Environment[J].Equipment Environmental Engineering,2025,22(3):53-61. |
| 热流环境下薄壁连接结构随机振动响应数值计算 |
| Random Vibration Response Numerical Calculation of Thin-walled Connection Structures under Heat Flux Environment |
| 投稿时间：2024-10-10 修订日期：2024-12-13 |
| DOI：10.7643/issn.1672-9242.2025.03.007 |
| 中文关键词: 薄壁连接结构 热流固耦合 随机振动 应力分布 模态频率 试验验证中图分类号:V214.4 文献标志码:A 文章编号:1672-9242(2025)03-0053-09 |
| 英文关键词:thin-walled connection structure heat-flux-solid coupling random vibration stress distribution modal frequency experimental verification |
| 基金项目:中国航发产学研合作项目(HFZL2018CXY017) |
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| 中文摘要: |
| 目的 研究薄壁连接结构在热流冲击和随机振动环境下的应力响应特性。方法 基于非线性大挠度振动理论进行薄壁结构高温随机振动响应分析，同时开展热振联合试验。根据试验验证的计算分析方法及热-流-固耦合理论，开展薄壁连接结构在热流冲击环境中的随机振动响应分析。结果 基频误差均小于4%，轴向应力误差均小于2.4%。结论 随着温度升高，薄壁连接结构应力响应峰值向左移动，应力响应曲线趋势不发生改变。流速在100~140 m/s时，对薄壁连接结构应力响应趋势的影响较小，随着流速的增大，结构应力相应数值有小幅增加。振动量级与薄壁连接结构轴向应力呈正相关，且振动量级增加，结构应力数值变化明显，在150~450 ℃对结构轴向应力的影响占主导地位。 |
| 英文摘要: |
| The work aims to investigate the stress response characteristics of thin-walled connection structures under thermal shock and random vibration environments. A high-temperature random vibration response analysis of thin-walled structures was carried out based on the nonlinear large deflection vibration theory, while combined thermal-vibration tests were conducted simultaneously. A random vibration response analysis of thin-walled connection structures in the thermal shock environment was performed based on the verified calculation and analysis method and the heat-flux-solid coupling theory. The base frequency error was less than 4%, and the axial stress error was less than 2.4%. With the increase in temperature, the peak of the stress response of the thin-walled connection structure shifts to the left, and the stress response trend remains unchanged. The flow rate within the range of 100-140 m/s has a relatively small influence on the stress response trend of the thin-walled connection structure. As the flow rate increases, the corresponding value of the structural stress increases slightly. The vibration level is positively correlated with the axial stress of the thin-walled connection structure. Moreover, as the vibration level increases, the structural stress changed significantly. The temperature range of 150-450 ℃ plays a dominant role in influencing the axial stress of the structure. |
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