| 摘要:对自由活塞式斯特林制冷机的吸振器部件进行理论仿真分析和结构优化设计。结构优化设计主要从吸振器的配重块布局、固定螺母配置、阻尼特性等3方面开展。通过调整配重块的非中心对称分布，改善吸振器部件的1、2阶模态偏差，避免吸振器部件的翻转运动对吸振性能产生影响；通过对吸振器表面喷涂阻尼材料，改善其阻尼特性，提升吸振效果。开展整机振动测试，测试结果表明优化后的整机振动幅值为优化前的1/5，优化设计效果明显。 |
| 关键词: 自由活塞式斯特林制冷机 吸振器 模态分析 阻尼特性 |
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| Optimal Design of Vibration Absorber Components of Free Piston Stirling Refrigerator |
| DENG Ruchao,LIANG Weiqing,LIU Jing,ZHANG Bin,HUANG Zhenjun,HUANG Xingdong |
| Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China;Shanghai Micropowers Ltd.,Shanghai 201203,China |
| Abstract:The theoretical simulation analysis and structural optimization design of the absorber components of the free piston Stirling refrigerator were carried out.The structural optimization design was mainly carried out from three aspects：the balance weight layout of the vibration absorber，the fixed nut configuration and the damping characteristics.By adjusting the non-center symmetrical distribution of the counterweight，the first and second order modal deviations of the vibration absorber components were improved to avoid the impact of the overturning motion of the vibration absorber components on the vibration absorption performance；The damping material was sprayed on the surface of the vibration absorber to improve its damping characteristics and improve the vibration absorption effect.Then whole engine vibration test was carried out.The test results showed that the vibration amplitude of the whole machine after optimization was 1/5 of that before optimization，and the optimization design effect was obvious. |
| Key words: free piston Stirling refrigerator vibration absorber modal analysis damping characteristic |
