# Questions tagged [diagram]

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### Schematic Diagrams for Mechanical Systems

Is there some sort of equivalent standardized schematical (topological) diagram -such as Piping and Instrumentation Diagram, Electrical Schematics, Process Flow Diagrams, etc.- for the realm of ...
• 3,597
4k views

### is bending moment on roller supports at beams zero?

isn't the bending moment supposed to be zero on roller supports at beams? then why isn't it zero here in this picture at x=2?
825 views

### I want to understand this pneumatic circuit

I have trouble understanding the following pneumatic circuit diagram: I am new to reading circuit diagrams and i am unfamiliar with some of the symbols. I would appreciate if somebody could explain ...
• 41
275 views

### How are common free body diagrams and similar illustrations made?

Over my education I've come across tons of engineering illustrations, most commonly free body diagrams and similar. I still do not know what software(s) is used to generate these. So many look very ...
• 31
408 views

### Pv Diagram of a pressure cooker

For a bit of self training in thermodynamics, I've been trying to think of some random systems and go ahead and try to solve them, some of these things I've stolen from random googling of university ...
423 views

### Is an axial force applied at the centre of a beam considered a compressive force, tensile force, or both?

I was looking through some course notes and realized that I never fully understood this concept. So, looking at the diagram below we can see that there is a 20kN axial force being applied in-between ...
88 views

### Proper designator for a torque guard in a P&ID

What's the proper first letter designator for a torque guard in a DIN or ISO compliant P&ID? I find fist-letter designators for a few physical values (L for level, S for speed etc.) but none for ...
• 4,781
743 views

### Problems with shear force diagram in beam model

I am starting to learn how to use ANSYS APDL. So I don't have much knowledge in the software. I have modelled a cantilever beam (with beam188 elements) and the only load that i have applied was the ...
1 vote
3k views

### What software is used for drawing dynamic & mechanical diagrams? [closed]

I need to sketch some diagrams involving basic symbols like springs and dampers, specifying angles, perpendicularity etc... something like the images below: Obviously my first option was word, then ...
• 409
1 vote
732 views

### What does this P&ID symbol represent?

The symbol: Here is a part of the diagram:
• 25
1 vote
146 views

### How to get a transfer function from this block diagram?

Pardon my paint skills, I did my best My attempt is short and seems to fail, I have no idea why: \begin{align} \alpha &= in - a_{1}\beta - a_{2}\gamma \\ \beta &= \alpha z^{-1} \\ \gamma &...
• 111
1 vote
6k views

### Electrical flowchart in Microsoft Visio : issues

I am trying to recreate in Microsoft Visio a diagram of a photovoltaic power plant that would look like the one below. But I have some issues for doing so, in particular : I don't know how to ...
• 169
1 vote
443 views

### In a control block diagram what does a block with an angled arrow through it mean?

I have been looking at papers describing how to do non linear control with neural networks. A lot of these papers have block diagrams with a symbol I don't understand. There is a block with an angled ...
1 vote
362 views

### Convention for spring symbols with lateral force

If you draw a diagram with a spring, is there any convention about how it should behave with lateral loads? I guess it might be either: Rigid Free Elastic with bending and/or shear stiffness Pin ...
• 426
1 vote
468 views

### Shear force and bending diagram un-uniformly distributed load

I already got great help on this topic, but I'd like to make sure that I get it. For example, take a beam of length 6 meters, left side fixed support and right side rolled support. There is a load of ...
1 vote
30 views

### should the hachures in moment and shear diagram be vertical?

when we plot the shear or moment diagram we add hachures to the area created with these diagrams , in most cases we see vertical hachures, is it represent the internal forces? or its just used to ...
1 vote
588 views

### How to check if bending moment diagram is correctly drawn

EDIT: I will state my test problem description and then my solution. But before that, I would like to apprise you of the absence of the actual description given during test (which happened in Zoom and ...
180 views

### ELI5: How does this water (solenoid) valve work?

I took apart this hose faucet timer: When unpowered the valve is closed. When powered (either manually or by timer) it opens allowing water to flow through. I am attempting to learn how the open/...
• 103
445 views

### Triangle symbol in pneumatic diagrams

After searching details regarding direction control valves, I can understand that the diagonal line indicates solenoid valve actuation. The zig Zag line represents the spring action so in this case ...
• 585
607 views

### Calculating the transfer function of this block diagram

I'm not really sure what steps to take to solve the problem. I tried with G4 and G2 first but I'm not sure if that is the correct way.
• 1
543 views

### How does one plot an Abbott Firestone curve

I have a Mitutoyo Sj-210, that plots automatically a Firestone curve. I have another device that gives me the SRM values and ect but no curve. I have no idea how the Sj-210 does it despite being ...
737 views

### formula for M(x) - Shear Force and Bending Moment Diagrams

I've watched the video "Understanding Shear Force and Bending Moment Diagrams" from "The efficient engineer" and i got a doubt in this exercise For $4<x<7$ I arrive to \$V=-6x+...
16 views

### 2011 Qianjiang Motorcycles 50cc engine assembly step by step?

Qianjiang is the MFG 201150cc moped What is the quickest way to start this engine? What needs to be installed? I have all parts plus extras, except for air box. I'm sure the vacuum hoses is going to ...
69 views

### How to get difference equation from this block diagram

I was posed a very similiar block diagram in my exam from this book (Alan V Oppenheim Ronald W Schafer - Discrete-Time Signal Processing-Pearson Education) but couldn't solve it: I want to solve for ...
161 views

### Function Structure Diagram for Tennis ball launcher

I created this Function structure diagram for a tennis ball launcher for my homework and am not sure about inputs and outputs please- are they correct please- it feels like I could include more in the ...
174 views

### What is the meaning of this symbol in Control System Diagram

I was reading the paper "Full-Speed Range Self-Balancing Electric Motorcycles Without the Handlebar" released in March 2016 by Professor Yang and Murakami in Keio University. I couldn't ...
53 views

### What is the engineering way to describe a factory / manufacturing plant system in a formel and mathematical way

I am interested in mathematically describing as well as formalising a manufacturing plant so that other people in the engineering field understand how the system works. I am not from the engineering ...
• 169