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首页> 《中国测试》期刊 >本期导读>基于振动特性仿真的机翼单向阀试验改进

基于振动特性仿真的机翼单向阀试验改进

154    2020-10-27

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作者:谢春稳, 杨文平, 郝新纲, 史新芳, 周新铭

作者单位:航空工业新航集团116厂民机事业部,河南 新乡 453019


关键词:机翼单向阀;随机振动;模态分析;PSD仿真;加速度计安装


摘要:

由于初始振动试验方案未充分模拟飞机安装连接、振动曲线异常衰减等原因,机翼单向阀振动试验报告未通过适航审查。采用Ansys对初始工装进行模态分析和PSD仿真,结果显示初始振动工装动态特性较差,存在多个低频共振点且不同产品安装点间动态响应差异较大。通过增加厚度、增加加强筋和将组合式工装更改为一体加工等方法对振动工装进行改进后,仿真结果表明工装动态特性改善明显,与初始工装相比一阶固有频率提高4.4倍且不同产品安装点间动态响应差异较小。采用新的试验方案重新进行试验,包括模拟产品在飞机上的实际安装、采用优化后的工装、优化控制加速度计位置等,试验结果趋势同仿真结果相吻合,试验过程和结果通过适航审查。


Test improvement of aircraft wing check valve based on vibration performance simulation
XIE Chunwen, YANG Wenping, HAO Xingang, SHI Xinfang, ZHOU Xinming
Civil Aircraft Business Division, AVIC Xinhang Group 116 Factory, Xinxiang 453019, China
Abstract: Because the initial test method did not simulate the actual installation on aircraft and the vibration curve dumps abnormally, the test result of the wing check valve did not get the airworthness’s approval. Ansys is used to perform modal analysis and PSD simulation; the results show that the dynamic performance of the initial test tooling was poor. There are many low-frequency resonance points and the dynamic response between different product installation points is unbalanced. The modal analysis and PSD simulation for the new test tooling show that the dynamic performance improves obviously through adding thickness and stiffeners, and changing assembly method to integrated processing with the test tooling, the first-order natural frequency raises to 4.4 times of the initial test tooling and there is minor difference about the dynamic response between different product installation points. Improvements are taken for the vibration test, including simulating the actual installation of the aircraft, optimizing the structure of vibration test tooling and the locations of the control accelerometer. The vibration test is re-conducted and the tendency of test result agrees with simulation. The test process and results have approved by the airworthness.
Keywords: aircraft wing check valve;random vibration;modal analysis;PSD simulation;installation of accelerometer
2020, 46(10):130-137  收稿日期: 2020-01-12;收到修改稿日期: 2020-02-28
基金项目:
作者简介: 谢春稳(1987-),男,河南新乡市人,工程师,硕士,研究方向为民机机载设备设计
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