以薄铝板为研究对象,采用杜阿梅尔-诺依曼线性结构理论分析温度场对结构固有振动的影响。温度对结构固有频率的影响主要在于,结构温度变化不均匀,热变形不能自由进行,在物体中产生拉压热应力,使得结构局部刚度增加或减小,改变了初始结构刚度分布,同时温度也会对结构的材料属性产生影响,因此可将结构刚度看作是由热效应引起的初应力刚度和结构自身的几何刚度的叠加,通过仿真分析发现热效应会使结构的固有振动频率降低,还会产生频率跃。 The thin aluminum plate is taken as the research object, and the influence of temperature field on the natural vibration of the structure is analyzed by the Duhmer-Neumann linear structure theory. The main influence of temperature on the natural frequency of the structure is that the structural temperature changes unevenly and the thermal deformation can not be carried out freely. The tensile and compressive thermal stress is generated in the object so that the local rigidity of the structure increases or decreases, changing the initial structural stiffness distribution, Therefore, the stiffness of the structure can be regarded as the superposition of the initial stress stiffness caused by the thermal effect and the geometric stiffness of the structure itself. The simulation results show that the thermal effect will reduce the natural frequency of the structure and will also generate Frequency jump.