waneyv91031
   
|
分享:
▼
x0
|
第一题
The maximum pressure that can be developed for a certain fluid power cylinder
is 15.0 MPa.
Compurte the required diamter for the piston if the cylinder must exrt a force
of 30kN.
第二题
In the United States , hamburger and other meats ar sold by the pound .
Assuming that this is 1.00-lb force,compute the mass in slugs,the mass in kg,and the weight in N
题组：
1.A measure of the stiffness of a linear actuator system is the amount of force required to cause
a certain linar deflction . For an actuator that has an inside diameter of 12.5mm and a length of 1.07m
and that is filled with a machine oil , compute the stiffness in N/m.
2.应用上题 but change the length of the cylinder to 250 mm. Compare the results.
3.应用上上题也就是 1. but change the cylinder diameter to 50mm. Compare the results.
4.Using the rsults of Problms 以上三题 , generate a statemnt about the general design approach
to achieving a very stiff system.
|
