为解决某型机车燃油箱在流固耦合条件下冲击工况的仿真计算问题，用燃油箱小模型对比了虚拟质量法与瞬态法相结合等4种仿真方法的结果，并基于标准冲击谱进行了冲击试验，同时将仿真结果与试验值进行了对比验证。对比结果显示，虚拟质量法与瞬态法相结合的仿真方法分析流固耦合条件下箱体的冲击工况最为准确。以1/3箱油液高度工况为例，计算了该型燃油箱在冲击工况下的三向应力，计算结果表明在1/3箱油液高度的条件下，其冲击应力小于许用应力值，满足使用要求。研究结果对分析结构流固耦合条件下的冲击应力具有一定的指导意义。
Abstract
In order to solve the simulation problem of shock working condition of a locomotive fuel tank under fluid-structure coupling, the results of four simulation methods such as the combination of virtual mass method and transient method are compared with the small fuel tank model, and the shock test is carried out based on the standard shock spectrum. At the same time, the simulation results are compared with the test values. The comparison results show that the simulation method combining virtual mass method and transient method is the most accurate to analyze the shock working condition of the box under the condition of fluid-structure coupling. Taking the working condition of 1/3 tank oil height as an example, the three-dimensional stress of this type of fuel tank under shock working condition is calculated. The calculation results show that under the condition of 1/3 tank oil height, the shock stress is less than the allowable stress value, which meets the service requirements. The research results have certain guiding significance for analysing the shock stress of the structure under the condition of fluid-structure coupling.
关键词
流固耦合 /
燃油箱 /
虚拟质量法 /
瞬态法 /
冲击
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Key words
fluid-solid coupling /
fuel tank /
virtual quality method /
transient method /
shock
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