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Impact Resistance and Energy Absorption Analysis of Crossover Frames with Different Materials
Zhong-Hua Lv1, Hao-Yu Wang1, Guang-Ru Hua2
1State Grid Liaoning Electric Power Company Limited Economic and Technology Research Institute, Shenyang 110027, China.
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To address the insufficient impact resistance of crossover frames in UHV transmission projects, this study investigates the impact response and energy absorption of undamped frames using Q420 steel, 45 steel, 6061-T6 aluminum alloy, and EP fiberglass. An energy conversion model is established, and 1:20 scaled tests and finite element simulation are conducted over 0.5-5.0 m drop heights. The results show that Q420 steel achieves the highest energy absorption; aluminum alloy balances specific energy absorption and lightweight performance; 45 steel performs moderately; fiberglass reduces peak force but has limited energy dissipation and brittle fracture risk. The efficiency of metals rises with drop height, while that of fiberglass shows a slight decline. This work provides a theoretical basis for material selection and crossover frame optimization.
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