惯导平台长时间通电有限元热分析  

Finite Element Thermal Analysis of Inertial Navigation Platform Powering on Continuously

作　　者：关永祥 汪立新 王琪 刘德俊 GUAN Yong-xiang;WANG Li-xin;WANG Qi;LIU De-jun(Rocket Force Engineering University,Xi＇an 710025)

机构地区：[1]火箭军工程大学,西安710025

出　　处：《导航与控制》2018年第5期106-112,F0003,共8页Navigation and Control

摘　　要：长时间通电会造成惯导平台腔内温度场发生较大变化,鉴于惯性仪表对环境场的敏感性,温度的变化将极大影响平台的性能。通过某型气浮惯导平台长时间通电温度场变化有限元热分析,建立了通电时间与平台各部件温度场模型、平台腔内温度场模型以及台体耦合的热弹性结构模型,得到了温度场分布的量化结果,分析了平台台体的热应力分布情况。在温度数据的处理过程中,利用Matlab构建数据模型,预测了各部件及腔内的温度变化趋势,并通过对比试验数据,验证了仿真结果的正确性,为后续研究提供了理论基础。The temperature field in the inertial navigation platform can be changed greatly due to the continuous power. In view of the sensitivity of the inertial instrument to the environment field, the temperature change will greatly affect the performance of the platform. Based on the finite element thermal analysis of the temperature field changes of a certain type of air-floating inertial navigation platform powering on continuously, the temperature field model of each part of the platform, the temperature field model in the platform cavity and the coupled thermo-elastic structural model of the platform were established. The quantitative results of temperature field distribution are obtained, and the thermal stress distribution of platform body is analyzed. In the processing of temperature data, using Matlab to build a data model predicts the trend of temperature changes in each component and cavity. By comparing the experimental data, the correctness of the simulation results was verified, which provides a theoretical basis for the follow-up research.

关 键 词：惯导平台 长时间通电 温度场 热应力 有限元 

分 类 号：U666.1[交通运输工程—船舶及航道工程]