高刚重比天线结构刚强度优化设计与分析

天线的发射和接收性能取决于反射面的形面精度，而结构刚强度是决定天线反射面形面精度的主要指标，因此对天线结构进行优化设计非常必要。文中提出了一种具有高刚重比的车载天线结构，采用ANSYS有限元分析软件对天线自重、抗风载荷和振动载荷性能进行了力学仿真分析。仿真结果表明，井形背架结构和桁架形背架结构均可为反射面提供高刚度的结构支撑，桁架形背架结构在强度方面优于井形背架结构，其最大应力值比井形背架结构的最大应力值小43.8 MPa，从而验证了该高刚重比车载天线结构优化设计的合理性和可靠性，可为同类型天线的设计提供理论支撑。

Structure Optimum Design and Analysis of Antenna with High Stiffness Weight Ratio

The transmitting and receiving performance of the antenna depends on the reflector precision and the structural stiffness of the antenna is the main performance index to determine the reflector precision, so it is very necessary to optimize the antenna structure. A vehicle-borne antenna with high stiffness weight ratio is proposed in this paper. Mechanical simulation analysis of the antenna self weight, wind load resistance and vibration load resistance is carried out by ANSYS finite element analysis software. The simulation results show that both well-shaped back frame structure and truss-shaped back frame structure can provide high stiffness structural support for the reflector; the truss-shaped back frame is superior to well-shaped back frame in strength and its maximum stress is 43.8 MPa smaller than that of the well-shaped back frame. The rationality and reliability of antenna structure optimum design is thus verified. The results can provide theoretical support for design of the same type of antenna.