Answer:
1 The weight of the foundation block should be enough to withstand vibrations
2 The foundation must be so dimensional that the resulting pressure due to weight of the device as well as the weight of foundation moves through the center of gravity of a base impact area in order to avoid the risk of specific settlement.
3.The base should be sufficiently rigid to have the requisite rigidity
4 a distance should be created all across machine foundation to separate it from the adjacent parts of the building
Explanation:
1. The weight of the foundation block should be enough to withstand vibrations and to avoid friction between device and the surrounding soil as well. This can be done by increasing the base block weight in supporting with engine power
2.The foundation must be so dimensional that the resulting pressure due to weight of the device as well as the weight of foundation moves through the center of gravity of a base impact area in order to avoid the risk of specific settlement.
3.The base should be sufficiently rigid to have the requisite rigidity as the slightest misdirection of foundation may cause significant bearing disorders.
4.To avoid propagation of vibration from a device to the adjacent parts of the building, a distance should be created all across machine foundation to separate it from the adjacent parts of the building.
Answer:
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Explanation:
Drafting has been around a long time. We can safely assume that since we’ve had a tool in our hands, we’ve been describing plans and technical representations and doodling ideas. Let’s take a closer aspect at drafting and its advance from an under-the-radar part of the method to a very developed skill set.
<u>Explanation</u>
• 1970s – The beginning computer-aided design systems were included in the industry. Following the design engineers tried the learning curve of using CAD, their performance and productivity went through the roof. Over time, CAD software became affordable and more user-friendly, and its fame grew.
• 1990s – CAD software was expanded further to include 3-D characteristics, and quickly the technical designs of the past enhanced increasingly simulated and accessible to engineer.
• Present – The development of drafting has brought us to the present day, were using 3-D representations is the standard and the aim to generate full virtual prototypes.
Answer:
22.90 × 10⁸ kg
Explanation:
Given:
Diameter, d = 0.02 m
ωₙ = 0.95 rad/sec
Time period, T = 0.35 sec
Now, we know
T= ![2\pi\sqrt{\frac{L}{g}}](https://tex.z-dn.net/?f=2%5Cpi%5Csqrt%7B%5Cfrac%7BL%7D%7Bg%7D%7D)
where, L is the length of the steel cable
g is the acceleration due to gravity
0.35= ![2\pi\sqrt{\frac{L}{9.81}}](https://tex.z-dn.net/?f=2%5Cpi%5Csqrt%7B%5Cfrac%7BL%7D%7B9.81%7D%7D)
or
L = 0.0304 m
Now,
The stiffness, K is given as:
K = ![\frac{\textup{AE}}{\textup{L}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctextup%7BAE%7D%7D%7B%5Ctextup%7BL%7D%7D)
Where, A is the area
E is the elastic modulus of the steel = 2 × 10¹¹ N/m²
or
K = ![\frac{\frac{\pi}{4}d^2\times2\times10^11}{0.0304}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cfrac%7B%5Cpi%7D%7B4%7Dd%5E2%5Ctimes2%5Ctimes10%5E11%7D%7B0.0304%7D)
or
K = 20.66 × 10⁸ N
Also,
Natural frequency, ωₙ = ![\sqrt{\frac{K}{m}}](https://tex.z-dn.net/?f=%5Csqrt%7B%5Cfrac%7BK%7D%7Bm%7D%7D)
or
mass, m =
or
mass, m = ![\sqrt{\frac{20.66\times10^8}{0.95^2}}](https://tex.z-dn.net/?f=%5Csqrt%7B%5Cfrac%7B20.66%5Ctimes10%5E8%7D%7B0.95%5E2%7D%7D)
mass, m = 22.90 × 10⁸ kg
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