摘要
针对某燃油箱在振动耐久性试验中油箱共振引起下箱体的振幅过大和底部破裂的问题,对该油箱进行扫频激振试验分析,发现有半箱水时会降低油箱的阻尼振动频率。利用有限元软件Hypermesh对该油箱模型进行模态分析得到该油箱的固有频率并与扫频激振试验结果对比。提出了三种下箱体底部结构的设计方案来改变该油箱的固有频率,并对结构改进后的油箱进行扫频激振试验。结果表明,改进后的油箱的固有频率有所提高。
Through the vibration endurance experiment of a fuel tank,it was found that the amplitude was large and the bottom was ruptured, which was caused by the resonance. Then the vibration frequency-sweeping experiment was carried out to get the natural frequency of the fuel tank.：It was found that when loading half tank of water, the frequency of damped vibration was reduced. The natural frequency of the fuel tank is obtained through the modal analysis by Hypermesh and compared with the results of the frequency-sweeping experiment . Three improved schemes of the bottom structure was proposed to change the natural frequency of the fuel tank. The vibration frequency-sweeping experiment of the improved fuel tank was carried out. It shows that the natural frequency is improved.
出处
《机械设计与研究》
CSCD
北大核心
2016年第4期159-162,共4页
Machine Design And Research
基金
广西高等学校优秀人才资助计划项目(桂教人〔2011〕40号)
广西自然科学基金资助项目(2013GXNSFAA019319)
广西科技计划资助项目(桂科攻1348005-12)
广西重点实验室建设资助项目(13-051-38)
广西研究生教育创新计划资助项目(2013105940802M01)
关键词
燃油箱
模态分析
固有频率
扫频激振试验
fuel tank
modal analysis
natural frequency
frequency-sweeping experiment
