Експериментальні дослідження вертикальних коливань спеціалізованого транспортного засобу з нелінійним підресоренням при переїзді одиночної нерівності
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Дата
2014
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПІ"
Анотація
В роботі представлені результати експериментальних досліджень коливань вантажу, що розміщений на спеціалізованому транспортному засобі (СТЗ) під час переїзду ним одиночної нерівності. Експерименти проведені у вигляді дорожніх випробувань на реальному макеті транспортного засобу. Конструкції СТЗ, що розглядаються має додатковий рівень підресорення з нелінійною характеристикою, яка має квазінульову жорсткість. Порівняльний аналіз показав, що підресорення з квазінульовою жорсткістю дозволяє істотно знизити рівні вібрацій, а отже підвищити плавність ходу СТЗ.
An ensuring the safety of goods and passengers transportation is one of the priority areas of automotive engineering. This point is particularly important for the transportation of dangerous goods. Here, providing high level of movement smoothness during the transportation is a point of great importance due to the possibility of negative influence of vibrations on such categories of goods. This is can lead to emergency situations. In the paper a design of specialized vehicle with two levels of suspension is presented and analyzed. The specialized vehicle has additional level of cushioning with nonlinear characteristic, which has quasi-zero stiffness. Such, suspension is able to realize a vibro-isolating state of the transporting dangerous goods. The paper deals with an experimental investigations of the vibrations during the transportations of the goods which are mounted on specialized vehicle. As experiments the road tests have been done. Experiments were carried out on the base of a measurement system "Ultra-V-I», which has been developed at the Department of the Dynamics and Strength of Machines of the National Technical University "Kharkiv Polytechnic Institute" (Kharkiv, Ukraine). The measuring system consists of: a detector of vibration accelerations, an analogue-to-digital converter (ADC) and a portable computer. "Ultra-V-I" has a valid certificate of state metrological certification and allows to make a measurement of vibration acceleration at the point of investigated object. The paper considered the moving of specialized vehicle through a single roughness at different velocities. Thus, the cart moving on the road with asphalt concrete pavement at some fixed time moved a obstacle. The experiment was conducted at the speed of movement of 5, 10 and 20 km / h. The research has carried out separately for the vehicle without nonlinear vibration compensators and with them. Comparative analysis has shown that quasi-zero stiffness cushioning reduces the level of goods vibrations, so magnifying the movement smoothing.
An ensuring the safety of goods and passengers transportation is one of the priority areas of automotive engineering. This point is particularly important for the transportation of dangerous goods. Here, providing high level of movement smoothness during the transportation is a point of great importance due to the possibility of negative influence of vibrations on such categories of goods. This is can lead to emergency situations. In the paper a design of specialized vehicle with two levels of suspension is presented and analyzed. The specialized vehicle has additional level of cushioning with nonlinear characteristic, which has quasi-zero stiffness. Such, suspension is able to realize a vibro-isolating state of the transporting dangerous goods. The paper deals with an experimental investigations of the vibrations during the transportations of the goods which are mounted on specialized vehicle. As experiments the road tests have been done. Experiments were carried out on the base of a measurement system "Ultra-V-I», which has been developed at the Department of the Dynamics and Strength of Machines of the National Technical University "Kharkiv Polytechnic Institute" (Kharkiv, Ukraine). The measuring system consists of: a detector of vibration accelerations, an analogue-to-digital converter (ADC) and a portable computer. "Ultra-V-I" has a valid certificate of state metrological certification and allows to make a measurement of vibration acceleration at the point of investigated object. The paper considered the moving of specialized vehicle through a single roughness at different velocities. Thus, the cart moving on the road with asphalt concrete pavement at some fixed time moved a obstacle. The experiment was conducted at the speed of movement of 5, 10 and 20 km / h. The research has carried out separately for the vehicle without nonlinear vibration compensators and with them. Comparative analysis has shown that quasi-zero stiffness cushioning reduces the level of goods vibrations, so magnifying the movement smoothing.
Опис
Ключові слова
дорожні випробування, плавність ходу, рівні вібрацій, небезпечний вантаж, квазінульова жорсткість, specialized vehicles, ride smoothness, vibration, dangerous goods
Бібліографічний опис
Експериментальні дослідження вертикальних коливань спеціалізованого транспортного засобу з нелінійним підресоренням при переїзді одиночної нерівності / А. Я. Калиновський [і ін.] // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Темат. вип. : Динаміка і міцність машин. – Харків : НТУ "ХПІ". – 2014. – № 58 (1100). – С. 31-39.