Analysis of buckling phenomena in Cyclonic separator stand.

INTRODUTION:

In science, buckling is an instability that leads to structural failure. The failure modes can in simple cases be found by simple mathematical solutions. For complex structures the failure modes are found by numerical tools.

When a structure is subjected to compressive stress, buckling may occur. Buckling is characterized by a sudden sideways deflection of a structural member. This may occur even though the stresses that develop in the structure are well below those needed to cause failure of the material of which the structure is composed.

OBJECTIVE:

*To perform a buckling analysis on a cyclonic separator stand buckling factor of safety.

* To create a metallic stiffener on the legs of the stand and run the analysis to find out the change in buckling factor of safety.

*To run a design study and find the optimum position for the stiffener. Compare the results for all the cases.

Assumptions:

Only cyclonic separator stand is taken under analysis.

orginal model analysed model

Model information:

Cyclonic separator stand without metallic stiffner	Solid Body	Mass:204.99 kg Volume:0.0266221 m^3 Density:7700 kg/m^3 Weight:2008.91 N

Cyclonic separator stand with metallic stiffner	Solid Body	Mass:255.522 kg Volume:0.0331846 m^3 Density:7700 kg/m^3 Weight:2504.11 N

BOUNDARY CONDITONS:

1. All bodies are considered as Homogeneous, isotropic bodies
2. All bodies are taken as Alloy steel
3. A load of 150KN is applied on the top face acting downwards.
4. Mesh conditions.

Mesh type : Solid mesh

Mesher used : standard mesh

Results:

1. Cyclonic separator stand without metallic stiffner

2.Cyclonic separator stand with metallic stiffner

3. Design study to finalize the position of metallic stiffner.

DESIGN STUDY SETUP Design Variables Name Type Value Units offset distance Range with Step Min:250 Max:1750 Step:250 mm Constraints Sensor name Condition Bounds Units Study name Buckling Factor of Safety1 is greater than Min:25.000000 Buckling 1 Goals Name Goal Properties Weight Study name Buckling Factor of Safety2 Maximize Buckling Factor of Safety 10 Buckling 1

COMPARISON OF BUCKLING LOAD FACTOR FOR ALL THE SCENARIOS:

SCENARIO	STIFFNER OFFSET DISTANCE FROM TOP OF THE STAND	BUCKLING FACTOR
1.(WITHOUT STIFFNER)	-	9.684
2	250 mm	12.130063
3	500 mm	15.748033
4	750 mm	21.300381
5	1000 mm	27.762167
6	1250 mm	21.797873
7	1500 mm	16.023632
8	1750 mm	12.276132

CONCLUSION:

1. Adding a stiffener to the cyclonic separtor stand will increase the Bucklig factor of satefy.

2. According to the design study for the postion of stiffener, a offset value of 1000mm from the top of the cyclonic stand gives the highest buckling factor of safety compared to all the remaining scenarios