- #1
Stephen Bulking
- 54
- 10
New poster has been reminded to post schoolwork problems in the Homework Help forums
Summary:: I am doing my structural analysis homework and I can't seem to identify between pin joint and roller.
Please take a look at the following exercises and help me understand:
1) In exercise 6.87, the joint at C is a pin joint whereas in exercise 5.63 the joints at the casters are rollers. I have solved these two problems check the answers, the assumptions I made about the joints are all correct. But the problem is they are all essentially a wheel with a PIN going through its center, how do I tell them apart? If they're not the same, please point out the difference.
2) I have added the two airplane exercises 5.67 and 5.27, and again with the same question the wheels of the airplane in 5.67 are rollers and I don't really know what joint I'm supposed to assign to the wheel in 5.27 (solving the problem does not require me to identify the joint at the wheel, I just hate it when I'm not on the same page with the book).
3) With question 1 answered, I'm still uncertain as to which joint I'm dealing with in exercise 6.84 (the truck) and how do I even draw a Free-body Diagram of the massive truck? I tried treating the wheels as rollers and did not succeed for not having enough equilibrium equations.
PS: I have included the support reactions of the joints (pin and roller) in 2D and 3D.
Please take a look at the following exercises and help me understand:
1) In exercise 6.87, the joint at C is a pin joint whereas in exercise 5.63 the joints at the casters are rollers. I have solved these two problems check the answers, the assumptions I made about the joints are all correct. But the problem is they are all essentially a wheel with a PIN going through its center, how do I tell them apart? If they're not the same, please point out the difference.
2) I have added the two airplane exercises 5.67 and 5.27, and again with the same question the wheels of the airplane in 5.67 are rollers and I don't really know what joint I'm supposed to assign to the wheel in 5.27 (solving the problem does not require me to identify the joint at the wheel, I just hate it when I'm not on the same page with the book).
3) With question 1 answered, I'm still uncertain as to which joint I'm dealing with in exercise 6.84 (the truck) and how do I even draw a Free-body Diagram of the massive truck? I tried treating the wheels as rollers and did not succeed for not having enough equilibrium equations.
PS: I have included the support reactions of the joints (pin and roller) in 2D and 3D.
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