舰用燃气轮机支架缩比模型试验方法研究

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摘要关键部件冲击试验是舰用燃气轮机抗冲击设计的必要考核手段。针对某燃气轮机支架系统抗冲击试验问题，首先，采用相似理论与等效冲击相结合的方法，选取与支架系统动力特性相关的物理量并推出相似关系。其次，确定支架冲击试验材料并通过试验得到力学特性，分析其受到的载荷、固有频率及模态振型。最后，提出一种燃机支架系统的缩比试验模型及试验方法，并通过有限元模型进行模态分析和冲击仿真计算，验证了支架缩比试验模型与原模型的等效性。结果表明：缩比试验模型一阶、二阶固有频率与原模型的相对误差均在10%以内；相对位移响应误差为13.69%，绝对加速度响应误差为3.18%，相对误差均在20%内，满足工程要求。验证了支架系统缩比模型及试验方法的有效性，为燃机支架系统抗冲击试验提供技术支撑。

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	武双双1
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	冯麟涵2
	张磊2
	闫明1
	王腾2

关键词 ：支架系统, 抗冲击试验, 相似理论, 等效冲击, 缩比试验模型

Abstract：The shock test of key components is a necessary means to evaluate the shock resistance design of marine gas turbine.Aiming at the shock resistance test of a gas turbine mount system,firstly,physical quantities related to the dynamic characteristics of the mount system were selected and the similarity relations were deduced by using the method of similarity theory and equivalent shock.Secondly,the shock test material was determined and the mechanical properties were obtained through the experiment.The load,natural frequency and modal shape were analyzed.Finally,a scaled test model and test method of a gas turbine mount system were proposed,and modal analysis and shock simulation were carried out by finite element model,which verified the equivalence between the scaled test model and the original.The results show that the relative errors of the first and second order natural frequencies of the scaled test model and the original are within 10%,the relative displacement response error is 13.69%,the absolute acceleration response error is 3.18%,and the relative errors are less than 20%,which meet the engineering requirements.The effectiveness of the scaled test model and test method is verified,which provides technical reference for the shock resistance test of the mount system.

Key words： mount system shock resistance test similarity theory equivalent shock scaled test model

收稿日期: 2022-04-21 出版日期: 2023-05-15

引用本文:

武双双1,2，冯麟涵2，张磊2，闫明1，王腾2. 舰用燃气轮机支架缩比模型试验方法研究[J]. 振动与冲击, 2023, 42(9): 106-111.
WU Shuangshuang1,2, FENG Linhan2, ZHANG Lei2, YAN Ming1, WANG Teng2. Scaled model and test method for marine gas turbine mount system. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(9): 106-111.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I9/106

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