乗客による鉄道車両の車体弾性振動低減効果とそれを活用した制振デバイス検討のためのモデリング

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概要

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• Passengers boarding on a railway vehicle are usually treated as additional mass in designing carbody and the natural frequencies of carbody flexural vibrations are considered to decrease as the number of passenger increases. However, some previous studies indicate that on-board passengers behave not as additional mass but as damping. This paper examines the damping effect due to passengers by using actual railway vehicles and compares the measurement results to the cases that iron blocks or water tanks are loaded. A stationary excitation test in the rolling stock testing plant for a commuter-type vehicle and a running test on a commercial line for a Shinkansen-train were conducted. From both tests, relatively large vibration reduction effects upon different natural modes of flexural vibration of the carbodies and little change of their natural frequencies were observed when passengers were aboard. On the other hand, natural frequencies were decreased when iron blocks or water tanks were loaded. The authors also tried to develop a numerical model to express the flexural vibration of carbody with passengers. It was found that a simple 1-DOF mass-spring-damper system with low natural frequency and high damping ratio can simulate a passenger well. According to those measurement results, it is expected that a new and valuable damping device against carbody flexural vibrations can be realized if we can simulate or mimic the effect of passengers correctly. Some basic directions or policies to develop such damping devices were discussed.

著者

• 富岡 隆弘

  （公財）鉄道総合技術研究所車両振動研究室

• 相田 健一郎

  （公財）鉄道総合技術研究所車両振動研究室

• 瀧上 唯夫

  （公財）鉄道総合技術研究所

• 秋山 裕喜

  （公財）鉄道総合技術研究所車両振動研究室

関連論文

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• 輪軸の質量アンバランスに起因する鉄道車両の車体振動抑制
• 旅客乗車による車両の振動特性変化が１次ばね系制振制御システムの制振性能に与える影響（旅客を考慮した車両モデルによる数値的検討と車両試験台での加振試験）
• 乗客による鉄道車両の車体弾性振動低減効果とそれを活用した制振デバイス検討のためのモデリング

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