| 摘要:某船用低速柴油机采用两级增压方式，导致扫排空系统气体压力大幅增加。为了确保扫排空系统结构的安全性，采用有限元方法仿真计算该扫排空系统的应力应变、模态及谐响应，并结合规范限制值和成熟机型的经验参数，对计算结果进行评价分析。结果表明:该低速机扫排空系统结构能够满足刚度及受迫振动要求。 |
| 关键词: 低速机 扫排空系统 应力 模态 谐响应 |
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| Structure Analysis of the Scavenge and Exhaust Systemfor Low Speed Diesel Engines |
| Yan Feng,Wang Kui,Wang Yanbing,Cheng Junfeng |
| China Shipbuilding Power Engineering Institute Co., Ltd., Shanghai 200129 |
| Abstract:A marine low-speed diesel engine adopted two-stage turbocharging，which resulted in large increase of gas pressure in scavenge and exhaust system. In order to ensure the structure safety of the system, the stress-strain, modal and harmonic response calculations for the system were carried out by finite element simulation method, and the evaluation were carried out by the norm limit value and the expe-rience parameters of the mature engines. The results show that the structure of the system can meet the requirements of stiffness and forced vibration. |
| Key words: low speed engine scavenge and exhaust system stress modal harmonic response |
