Abstract: Suspended monorail trains have established mature technological frameworks in the field of passenger transport, yet significant gaps persist in freight applications, particularly for heavy-load transportation. Current suspended trains are mostly limited to low-speed light-load scenarios on the ground and underground, leaving potential aerial transport underdeveloped. In response to heavy-load transportation demands, the heavy-load suspension tanker was redesigned around the bogie, oil tank suspension device, oil tank and traction system. The bogie was the critical load-bearing and operational element of heavy-load suspended tankers, and its strength directly determined the operational safety of trains. The bogie not only withstood all the weight from the vehicle and cargo but also had to deal with complex operating environments such as curved driving, ramp driving, and possible impacts and vibrations. Therefore, the design of the bogie must ensure sufficient strength and stiffness under various working conditions to avoid structural failure and ensure transportation continuity. Through constructing multi-condition strength analysis models (static/straight /curve/uphill), it is verified that the bogie has a high safety margin and further optimization space. And based on this, topology optimization with the goal of reducing quality was carried out, ultimately achieving the goal of reducing architecture weight by 22.08%.

Key words: vehicle engineering; heavy-load suspended tanker; bogie; strength analysis; structural optimization

摘要： 悬挂式单轨列车在客运领域已形成了成熟的技术体系，但在货运尤其是重载运输研究方面仍存在显著空白；现有悬挂式运输列车多限于地面和地下的低速轻载场景，空中运输潜能尚未充分释放。针对重载运输需求，围绕转向架、油罐悬吊装置、油罐和牵引系统对重载悬挂式罐车进行了重新设计。转向架作为重载悬挂式罐车的关键承载和运行部件，其强度直接关系到车辆的运行安全性，不仅要承受来自车体和货物的全部重量，还要应对复杂的运行环境(如曲线行驶、坡道行驶以及可能的冲击和振动)，转向架设计必须确保在各种工况下都能保持足够的强度和刚度，以避免结构失效和确保运输的连续性；通过构建多工况强度分析模型(静止/直线/曲线/上坡)，验证了转向架具有较高的安全裕度，且有进一步优化的空间；并据此进行以质量减轻为目标的拓扑优化，实现了构架减重22.08%的目标。

关键词: 车辆工程；重载悬挂式罐车；转向架；强度分析；结构优化