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Консультация № 178977
07.06.2010, 14:03
41.76 руб.
13.06.2013, 15:46
0
0
0
Здраствуйте, Эксперты! Помогите решить задачу по динамике! 
Задача Д4
Вертикальный вал АК , вращающийся с постоянной угловой скоростью (ω = 10с-1, закреплен подпятником в точке А и цилиндрическим подшипником в точке, указанной в табл. в столбце 2 (АВ = ВО = DE = ЕК = Ь). К валу жестко прикреплены невесомый стержень 1 длиной l1 = 0,4 м с точечной массой m1, = 6 кг на конце и однородный стержень 2 длиной l2 = 0,6 м, имеющий массу m2 = 4 кг; оба стержня лежат в одной плоскости. Точки крепления стержней к валу указаны в таблице в столбцах 3 и 4, а углы α и β- в столбцах 5 и 6. Пренебрегая весом вала, определить реакции подпятника и подшипника. При окончательных подсчетах принять b = 0,4 м.
Указания. Задача Д4 - на применение к изучению движения системы принципа Даламбера. При решении задачи учесть, что когда силы инерции частиц тела (в данной задаче стержня 2) имеют равнодействующую Rи, то численно Rи = mac, где ас - ускорение центра масс С стержня, но линия действия силы Rи в общем случае не проходит через точку С .
Рисунок к задаче:
Условие к задаче:
Задача Д4
Вертикальный вал АК , вращающийся с постоянной угловой скоростью (ω = 10с-1, закреплен подпятником в точке А и цилиндрическим подшипником в точке, указанной в табл. в столбце 2 (АВ = ВО = DE = ЕК = Ь). К валу жестко прикреплены невесомый стержень 1 длиной l1 = 0,4 м с точечной массой m1, = 6 кг на конце и однородный стержень 2 длиной l2 = 0,6 м, имеющий массу m2 = 4 кг; оба стержня лежат в одной плоскости. Точки крепления стержней к валу указаны в таблице в столбцах 3 и 4, а углы α и β- в столбцах 5 и 6. Пренебрегая весом вала, определить реакции подпятника и подшипника. При окончательных подсчетах принять b = 0,4 м.
Указания. Задача Д4 - на применение к изучению движения системы принципа Даламбера. При решении задачи учесть, что когда силы инерции частиц тела (в данной задаче стержня 2) имеют равнодействующую Rи, то численно Rи = mac, где ас - ускорение центра масс С стержня, но линия действия силы Rи в общем случае не проходит через точку С .
Рисунок к задаче:
Условие к задаче:
Обсуждение
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