基于ABAQUS高压电缆线槽的动力学有限元分析
Dynamic Finite Element Analysis Based on ABAQUS High Voltage Cable Trunking

线槽内短路引发的爆炸冲击波是电缆设备和电力系统损坏的主要原因。因此，研究爆炸冲击载荷及模态分析对线槽保护装置的结构设计和防爆性能至关重要。本文对由玻璃纤维和环氧树脂构成的复合材料电缆槽体进行了相关设计和三维建模，并利用ABAQUS软件建立了高压电缆线槽的三维数值爆炸和模态仿真模型。在仿真计算中，采用CONWEP模型，在线槽接口处的多个位置施加不同当量的TNT炸药，以评估结构在线弹性阶段内的冲击影响。同时，利用Lanczos算法进行模态分析计算，得出其固有频率。通过对仿真结果的分析，我们可以确定可能出现破坏的位置，并进行冲击影响评估。双节线槽接口处较为薄弱，可能出现较大的应力集中和变形，可对其进行加强处理。此外，在相同位置增加TNT药量会导致位移呈线性增加，在结构设计中应注意避免共振现象，以确保结构的稳定性和安全性。综合分析结果，本研究为220 KV高压电缆线槽的结构设计和防爆性能提供了一定的指导和参考。
Explosive shock waves triggered by short circuits in wireways are the main cause of damage to cable equipment and power systems. Therefore, the study of explosive shock load and modal analysis is crucial for the structural design and explosion-proof performance of wireway protection devices. In this paper, the relevant design and three-dimensional modeling of the composite cable trunking body composed of glass fiber and epoxy resin are carried out, and the three-dimensional numerical explosion and modal simulation model of the high-voltage cable trunking is established by using ABAQUS software. In the simulation calculations, the CONWEP model was used to apply different equivalents of TNT explosives at multiple locations at the interface of the cable trough to evaluate the structural impact effects. At the same time, modal analysis calculations were performed using the Lanczos algorithm to derive the intrinsic frequency. By analyzing the simulation results, we can identify the locations where damage may occur and perform impact impact assessment. The interface of the double-section wireway is weak and may have large stress concentration and deformation, which can be strengthened. In addition, increasing the TNT charge at the same location will lead to a linear increase in displacement, and care should be taken to avoid the resonance phenomenon in the structural design to ensure the stability and safety of the structure. With the comprehensive analysis results, this study provides some guidance and reference for the structural design and explosion-proof performance of 220 KV high-voltage cable trunking.