CAJ | 학술논문

结合欧系车辆转向架技术创新特点，提出一种基于刚柔耦合仿真技术的车下质量橡胶吊挂优化设计方法。横向振动耦合机制是指以二系横向悬挂构成车体对走行部接口传递媒介的横向高频振动耦合机制，且具有抗蛇行高频阻抗、车体摇头大阻尼和“无纵梁无骨架”铝合金车体3大特殊性。因而整装车体下部1阶横向弯曲模态振动将对车体技术服役寿命30年造成十分严重的负面影响。对于车下质量橡胶吊挂来讲，比例阻尼是抑制车下质量横向振动的积极因素之一，而对中部地板横向加速度则具有极值特征，即比例阻尼取0．5％，其全频域（RMS ）3σ最小。也应当注意到上述减振技术的局限性，即在走行部非常工况下，较大的车下质量存在横向耦合振动的可能性，进而造成自重楔紧失效。
결합구계차량전향가기술창신특점，제출일충기우강유우합방진기술적차하질량상효조괘우화설계방법。횡향진동우합궤제시지이이계횡향현괘구성차체대주행부접구전체매개적횡향고빈진동우합궤제，차구유항사행고빈조항、차체요두대조니화“무종량무골가”려합금차체3대특수성。인이정장차체하부1계횡향만곡모태진동장대차체기술복역수명30년조성십분엄중적부면영향。대우차하질량상효조괘래강，비례조니시억제차하질량횡향진동적적겁인소지일，이대중부지판횡향가속도칙구유겁치특정，즉비례조니취0．5％，기전빈역（RMS ）3σ최소。야응당주의도상술감진기술적국한성，즉재주행부비상공황하，교대적차하질량존재횡향우합진동적가능성，진이조성자중설긴실효。
According to the innovative technique features of high-speed bogies for European vehicles,an optimized design methodology for rubber suspensions of under-floor masses was proposed based on rigid-flex coupling simulation techniques.Lateral vibration coupling mechanism is the coupling mechanism of lateral high-frequency vibrations caused by the lateral secondary suspensions for the coach body relative to running gears,with three particular features of anti-hunting high-frequency impedance,higher damping of coach yaw and aluminum-alloy coach without longerons and skeletons.The modal vibrations of 1 st order lateral bending mode of the coach had very negative impacts on the technical specifications of 30-year life-time.For the rubber suspensions of under-floor masses,its proportional damping is one of active factors in suppressing the lateral vibrations of under-floor masses.But there is an optimal value for the lateral acceleration of the middle floor,i.e.,the minimum value of (RMS)3σin a full frequency-band could be achieved when the proportional damping is 0.5.Meanwhile,the limitation of the above damping technique should be paid much attention to,i.e.,it is possible that the lateral coupling vibrations of under-floor masses may occur under abnormal conditions of running gears.