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Химическая и лесная промышленность
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Finite Element Modeling of Leaf Springs in Multibody Systems. New flexible body formulation for leaf spring for multibody systems simulation

Формат:      Страниц 168
     мягкая обложка
Автор:
Mohamed O.    
Издательство:
Книга по Требованию    
Год:2010
Цена:
2665 руб
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A shear-deformable beam element is developed to analyze large rotation and large deformation problems. The floating frame of reference formulation is employed to accurately model the leaf springs nonlinearities. Accurate modeling of the leaf springs is essential in evaluating ride comfort, braking, NVH, and stability. Using the ANCF, nonlinear strain-displacement relationships are used to define the elastic forces. To study the dynamics of very flexible leaf springs, the absolute nodal coordinate formulation (ANCF) is used. The braking-induced-steering can lead to rollover instability. In this study, the dynamics of a detailed SUV model is investigated by using the model in a parametric study to examine the effect of various design configurations. The new ANCF beam wa used to analyze very flexible leaf springs in this investigation. The beam mass matrix remains constant while the centrifugal and Coriolis forces are zero. Leaf springs are essential elements in the suspension systems of vehicles including sport utility vehicles(SUV), trucks, and railroad vehicles. Vehicle rollover may result from severe braking during lane changes, cornering, and maneuvering.
Патронташ со стопками.
Охотнику, туристу, болельщику и просто любителю спонтанных праздников это изобретение может весьма пригодиться. Набор удобных пластиковых
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Раздел: Глобусы

Методы прогноза лавинной опасности
Факторы Воздействие на лавинообразование А. Постоянные факторы 1. Условия подстилающей поверхности 1.1. Относительная высота, общая топографическая ситуация: Определяют глубину расчленения (высоту падения лавин) и заснеженность в зависимости от широты места и абсолютной высоты и ориентации хребтов зона гребней и высоких плато Сильное влияние ветра на распределение снега, снежные карнизы, локальные лавины из снежных досок зона между гребнями и верхней границей леса Метелевое снегонакопление, обширная зона формирования лавин из снежных досок зона ниже верхней границы леса Уменьшение влияния ветра на перераспределение снега, уменьшение количества лавин из твердых досок, преобладание лавин из мягких досок 1.2. Крутизна склона Определяет критическую высоту снега > 35o Часто формируются лавины из рыхлого снега > 25o Часто формируются лавины из снежных досок > 15o Течение снега, нижний предел формирования лавин lovэchov i aklada els vi, 1956. 205 p. 75.          Judso A., Leaf C.F., Bri k G.E. A process-orie ed model for simula i g avala che da ger. J. Glaciol., 26 (94), 53-63. 76.          Kli ke berg P.


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