代做FV2204编程、代写Python，Java程序语言、c++编程代写

日期：2021-03-23 11:38

FV2204 Computational Engineering

Assignment 2 Brief

The work should be word-processed, and submitted online to Canvas unless

specified below. The deadline for submission is 23:59 on 12 April 2021

(Monday).

Aims of Assessment

The module aims to provide students with fundamental knowledge and skills of using computing in

fire hazard analysis. This includes both essential numerical programming skills required to carry out

basic engineering computations within generic programming environments and application of

specialist software to solve typical computational problems of fire engineering.

Learning Outcomes

This piece of assessment will test your ability to meet learning outcomes 1-4 as described in your

module booklet: -

1. Use and apply Scilab to plot graphs of functions given both analytically and by the data from

text files. Incorporate those graphs into reports electronically

2. Apply standard numerical methods of computational engineering, e.g. curve fitting and

interpolation, solution of simultaneous linear equations, and statistical processing of

experimental data

3. Write Scilab scripts and function to carry out engineering computations and plot complex

graphs

4. Demonstrate the use of problem solution tools and evaluative skills in the selection of

appropriate methods of analysis

Assignment Details

? This is an individual assignment. Copying from the works of another person

constitutes plagiarism, which is an offence with the University’s regulations and will

result in a mark of ZERO for the assignment.

? This assignment requires the students to complete ALL questions as attached;

? The word limit is 2500 works (+/- 10%);

? All the assumptions/definitions, comments in the scripts and explanation in your

answers should be clearly stated due to be awarded;

? Submission of all input script files and snapshots of output results are required; and

? This assignment will carry 50% weighting of the total mark for this module.

Submission Details

This assignment should be submitted online to Canvas by the deadline given above. Submission of

Turnitin Report is NOT required. Five days rule will be applied for any late submission, i.e. 40% mark

is capped.

Page 2 of 5

Assignment Details (Learning Outcome: 1-4)

Q1. The architectural layout of the 2-stories building is shown in the sketch as below. The

headroom of G/F and 2/F is 5 m and 3 m respectively. The multi-function rooms at

G/F may involve the usage as assembly hall or exhibition functions. (40 Marks)

Each student shall use FDS+Evac to study the occupants’ evacuation of the whole

building including G/F and 2/F under the following three scenarios.

a) Fire Drill Model: No fire is involved. All the exits and staircases are available for

evacuation. Detection time is assumed as 0s.

b) Evacuation Scenario A - Front entrance at G/F is blocked by fire at T=120s. Fire

affecting area at front entrance is around 2m*2m close to the door centre. Detection

time is assumed to be 20s.

c) Evacuation Scenario B – Upper landing area to the left staircase is blocked by fire

at T=60s. Fire affecting area to the left staircase is around 2m*2m close to the exit

door of meeting room. Detection time is assumed to be 30s.

To demonstrate your works, the assignment shall incorporate the below items:

Multi-function

Room

Figure 2 - Layout Plan (G/F)

20 m

14 m

Not to scale

Figure 1 - Layout Plan (2/F)

Office

12 m 8 m

5 m 7 m 8 m

6 m

6 m

2 m

1m 1m

Meeting

Room

Office Office Office Legend:

Single leaf exit door

0.8m (W) * 2.0m (H)

Double leaves exit door

1.8 m (W) * 2.0m (H)

Multi-function

Room

8 m 8 m

1m

1m

4.5m

Page 3 of 5

(1) you will have to report the main assumptions of the occupants in each space,

occupants’ profile including pre-movement time assumption, unimpeded walking

speed on horizontal floor or downward stairs, etc. for each scenario.

(2) FDS+Evac input scripts shall be provided.

(3) The simulation results shall be summarized in the RSET table to indicate the

clearance time for each room and floor.

(4) Evacuation screenshots in every 30 seconds shall be provided.

Q2. Consider the set of parametric equations:

??(??) = ??

0.15??

??????2??

??(??) = ??

0.15??

??????2??

Create the following plots on the same page:

(a) X versus t

(b) Y versus t

(c) Y versus X

(10 Marks)

Test Case:

Q3. Consider a T-square developing fire with the heat

release rate ???(??). It is assumed that the design fire will

develop from ignition to peak heat release rate ???

????????

in a t-squared growth rate and then burn out by a tsquared

decay rate with the same ratio. The profile is

illustrated as below:

Assume the fire class is labelled as

U – ultra-fast,

F – fast,

M – medium, and

S – slow.

Write a function using Scilab to read the label of fire

class and the developing time (T) from ignition to the

peak heat release rate and plot the heat release rate

???(??) vs time ??. The function shall output the results

of time and heat release rate automatically to an

external file. (20 Marks)

Test Case:

--> Q3_plot("F",100)

--> Q3_plot("U",300)

Time (seconds)

Heat release rate (kW)

T

???

????????

???

???????? = ?? ? ??

2

Fire class Fire growth rate,

?? (????/??

2

)

Ultra-fast 0.1876

Fast 0.0469

Medium 0.0117

Slow 0.0029

Page 4 of 5

Q4. The following equations are used to calculate the thermal response of a detector or

sprinkler located at or near a ceiling whose area is large enough to neglect the effects

of smoke layer development. When the detector or link temperature reaches its

activation temperature,

Total theoretical fire heat release rate at time ?? (kW)

?? Radial distance of the detector/sprinkler from the vertical axis of the fire (m)

?????? Response Time Index of detector/sprinkler

????????,??+???

Temperature of the jet at the next time step, ?? +??? (

oC)

????????,??

Temperature of the jet at the previous time step, ?? (

oC)

??∞ Ambient space and initial detector/sprinkler temperature (oC)

????,??

Detector or sprinkler temperature at time, ?? (

oC)

?????????????????????? Detector or sprinkler activation temperature, ?? (

oC)

????????,??

Velocity of the ceiling jet gases at the time step, ?? (m/s)

?? Vertical entrainment distance; the difference between the height of the ceiling and

the base of the flames (m)

Assume the fire will develop as a t-square growth fire. Four fire classes “U” – ultrafast,

“F”- fast, “M” – medium and “S” – slow will be considered, same as the

definition in question Q3.

Write a Scilab function and define the required input parameters such as

detector/sprinkler information, fire class, initial ambient temperature and time step as

the input arguments for the defined function. Use the above equations to estimate the

activation time of the detector/sprinkler (????,??

) and required heat release rate to

activate the detector/sprinkler. Try to plot the detector temperature (????,??

) , ceiling jet

temperature (????????,??

) and heat release rate versus time. The generated results are also

required to be automatically saved to a text file as illustrated in the test case. First 10

Page 5 of 5

rows and last 10 rows in the exported txt file should be attached as a reference.

(30 Marks)

Test Case:

Marking Criteria for Assignment

The submitted assignment will be marked according to the following criteria:

Questions Marking Allocation Marking Criteria

Q1 40 Demonstrate the use of building evacuation model

(FDS+Evac) and evaluative skills on the designed

evacuation scenarios to estimate the egress time

for the building

Q2-Q3 30 Use and apply Scilab to plot graphs of functions

given and read input data from external text file to

generate sound outcomes or findings.

Q4 30 Use and apply Scilab to carry out numerical

methods of computational engineering and plot

complex graphs

Total 100

– END OF ASSIGNMENT –