目的 为确保某型新燃料组件运输容器在场外运输中的栓系安全性和有效减振效果,本文针对性地设计一种减振栓系装置。方法 设计一种双层格架式栓系装置,通过定位销与压紧横梁实现水平和垂直限位,并利用钢丝绳隔振器及天然橡胶垫板进行多重减振。采用有限元仿真与公路运输试验进行验证：运用有限元方法,依据IAEA SSG-26中更严苛的铁路运输加速度组合,校核减振栓系装置的栓系强度;通过公路运输试验,沿车体悬架至容器内部布置传感器,开展时域、频域及振动传递分析,检验减振栓系装置的减振性能。结果 仿真结果表明,在组合加速度（5g,2g,1g）和（5g,2g,-3g）作用下,各主要承力部件最大应力均低于材料屈服强度,栓系结构强度满足设计要求;运输试验监测数据显示,振动冲击沿传递路径总体呈衰减趋势,在经过减振底座时尤为明显,公路运输全程容器内部组件三轴向加速度最大值均未超过3.5g,远低于6g冲击限值。结论 设计的栓系装置结构强度与减振性能均满足工程运输要求,该研究可为同类核燃料运输容器的栓系系统设计及减振优化提供参考。
Abstract
To ensure the tie-down safety and effective vibration damping of a new fuel assembly transport container during off-site transportation, the work aims to specifically design a vibration-damping tie-down device. A double-layer grid-type tie-down device was developed, which achieved horizontal and vertical restriction through positioning pins and clamping beams, and incorporated multiple vibration-damping measures with wire rope isolators and natural rubber pads. Finite element simulation and highway transport tests were conducted for validation: the finite element method was employed to verify the tie-down strength under the more stringent railway acceleration combinations specified in IAEA SSG-26. Highway transport tests were performed with sensors arranged along the path from vehicle suspension to container interior to carry out time-domain, frequency-domain and vibration transmission analyses, thereby evaluating the damping performance of the device. Simulation results showed that under combined accelerations of (5 g, 2 g, 1 g) and (5 g, 2 g, -3 g), the maximum stresses in all major load-bearing components remained below the material yield strengths, confirming that the tie-down structure met the design strength requirements. Transport test monitoring data demonstrated that vibration and shock loads exhibited an overall attenuation trend along the transmission path, with particularly notable attenuation across the damping base. Throughout the highway transport, the maximum tri-axial accelerations inside the container did not exceed 3.5 g, well below the 6 g impact limit. The designed tie-down device satisfies both structural strength and damping performance requirements for engineering transport applications, and this work may serve as a reference for the tie-down system design and damping optimization of similar nuclear fuel transport containers.
关键词
运输容器 /
新燃料组件 /
栓系装置 /
减振 /
运输试验
Key words
transport package /
new fuel assembly /
tie-down device /
vibration damping /
transport test
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