温度和应力场耦合技术在铝粉料仓设计的应用

Temperature and Stress Field Coupling Analysis Technique in Aluminum Powder Silo

针对铝粉料仓在现场焊接安装时螺栓破坏的问题,采用温度和应力场耦合技术对料仓进行数值模拟分析,通过建立几何和分析数学模型,详细分析料仓的变形和螺栓孔应力情况。通过数值分析结果得知随着给定强迫位移边界条件的增大,应力值先是减小,当达到拐点时,随即增大,由于给定的是强迫位移边界条件,使得到达拐点后应力值增大,实际螺栓孔越大,越不会产生应力集中,但料仓趋于不稳定,易产生松动和振动,因此螺栓孔必须取适当的值,才能满足现场的实际工艺要求。应用温度和应力场耦合分析技术,得出了铝粉料仓安装问题和实际现场实验一致性的结果,为工程设计提供了有利理论依据。

In order to solve bolt failure problems of Aluminum Powder Silo welding installation in the field,coupling numerical study about the temperature and stress field was carried out on the Silo.Geometry model and mathematical analysis model are established,and deformation and bolt hole stress situation of silo are also analyzed.As the result of numerical analysis,stress value first reduced with the increase of the given force boundary conditions of displacement,and then increasing whenreaching a turning point.Due to forced displacement boundary conditions,the stress value increases when reaching the turningpoint.Larger the actual size of the bolt hole is,the less stress concerntration it will make.However,bin will tend to be unstable,looseness and vibration of the bolt holes easily arise.Therefore,selecting the appropriate value can meet the demand of practical technology in the field.With the application coupling analysis technology on temperature and stress field,results indicate that the installation problem of aluminum powder storage bin agree absolutely with practical experiment in the field,providing a favorable theoretical basis for engineering designment.