窦金鑫,于晓光,杨同光,刘忠鑫

• 1:辽宁科技大学机械工程与自动化学院

摘要(Abstract)：

为了研究含裂纹航空液压直管的振动响应特性,防止液压管路系统出现灾难性失效,针对液压直管可能出现的斜裂纹故障,考虑剪切力以及剪切系数的影响,推导出斜裂纹液压直管的局部柔度系数表达式,从而建立斜裂纹液压直管流固耦合有限元模型。利用Newmark-β积分法求解了液压直管的振动响应,将数值计算结果与试验测试结果对比分析,验证了有限元模型的正确性。利用本文模型分析了裂纹夹角和柱塞泵转速对液压直管系统振动响应特性的影响,结果表明:裂纹夹角的变化会影响液压直管的振动响应,当裂纹夹角趋于0°时,液压直管的振动响应幅值最小,随着裂纹夹角的增加,裂纹对液压直管振动响应的影响更显著;在不同的转速下,横向裂纹液压直管的振动响应幅值均大于斜裂纹液压直管。

关键词(KeyWords)： 航空液压直管;斜裂纹;振动响应;应力强度因子;有限元法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51775257）

作者(Author): 窦金鑫,于晓光,杨同光,刘忠鑫

DOI: 10.13675/j.cnki.tjjs.200264

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