为研究登高平台消防车的结构强度，针对其副车架、支腿及臂架的结构设计对整车稳定性、安全性的影响问题，采用ANSYS软件仿真，研究其结构强度，并用实验进行验证。分别建立简化的副车架、支腿一体式三维模型和臂架三维模型，模拟其在各种工作状态下的应力分布情况，再搭建实验环境进行应力测试。结果显示：整个臂架向消防车正左或正右水平展开的工况下，更容易出现支腿虚腿现象，虚腿量分别为22.5 mm和17.5 mm；臂架在回拉与伸出过程中最大应力出现在折叠臂变幅绞点区域、伸缩臂搭接区域；实验与仿真得到的应力数据相差约4%。这不仅对于登高平台消防车安全性检测起到很好的指导作用，还验证了仿真方法的可信度，有助于登高平台消防车的结构件设计及优化。

In order to study the structural strength of platform fire fighting vehicles, and to address the impact of the structural design of its sub-frame, stabilizers, and booms on the stability and safety of the entire vehicle, ANSYS software simulation was used to study its structural strength, and experimental verification was conducted. A simplified 3D model of the sub-frame with stabilizers, and the booms were established separately, the stress distribution under various working conditions was simulated. Then, an experimental environment was set up for stress testing. The results show that when the entire boom is horizontally extended to the left or right of the fire fighting vehicle, it is more likely to experience the phenomenon of virtual legs, with the values of 22.5 mm and 17.5 mm, respectively. The maximum stress of the boom during the retraction and extension process occurs in the area of the folding arm's variable amplitude hinge point and the overlapping area of the telescopic arm. And the difference between the stress data obtained from experiments and simulations is about 4%. This not only provides good guidance for the security testing of platform fire fighting vehicles, but also verifies the credibility of the simulation method, which is helpful for the structural design and optimization of platform fire fighting vehicles.