1.a Which meshing considerations are important to consider when performing a modal analysis?

1.b sing the Ansys command remote force is sometimes handy to apply a force to a model. In which case could precaution be appropriate and why

1.a Show that you understand what element distortion is by explaining the general problem caused by too distorted elements and drawing ideally and distorted elements of the following types: a) Solid tetrahedron b) Solid hexahedron c) Triangular 2D-element d) Quadrilateral 2D-element

1.b What are the thermal analysis equivalent parameters, and their corresponding units, of the following structural parameters ?

a) D isplacement

b) Strain

c) Stress

d) Load

e) Essential boundary conditions

f) Elastic supports   

1. Use Thwaites' method to find the separation point for flow across a infinitely long cylinder (BOUNDARY LAYER THEORY IN FLUID MECHANICS).

Consider a simple ideal Rankine cycle which uses water as the working fluid. The boiler pressure is 6100 kPa and the condenser pressure is 30 kPa. At the turbine inlet, steam is at 480°C. The isentropic efficiency of the turbine is 92 percent. The pump losses are negligible and the water leaving the condenser is subcooled by 6.3°C. The boiler is sized for a mass flow rate of 20 kg/s. Determine the following values.

The temperature at the pump inlet.

°CThe specific volume at the pump inlet.

m³/kgThe specific enthalpy at the turbine exit.

kJ/kgThe rate at which heat is added in the boiler.

kWThe power required to operate the pumps.

kWThe net power produced by the cycle.

kW

The thermal efficiency.

Consider a simple ideal Rankine cycle which uses water as the working fluid. The net power of power plant is 220-MW. At the turbine inlet, steam is at 9 MPa and 560°C. The condenser pressure is 20 kPa. Determine the following values.  

The temperature at the pump inlet.

°CThe specific enthalpy at the pump inlet.

kJ/kgThe specific volume at the pump inlet.

m³/kgThe pump work.

kJ/kgThe temperature at pump exit.

°CThe specific entropy at turbine inlet.

kJ/kg·KThe quality of steam at turbine exit.

The temperature of steam at turbine exit:

°C. Now using calculated T and s values draw a T-s diagram to compare with the one in notes or textbook. You may use the plot_TS_water function. The thermal efficiency of the cycle.

%

The mass flow rate of the steam.

1. Use the approximate integral method to find the pressure gradient at the inlet of a circular pipe (BOUNDARY LAYER THEORY IN FLUID MECHANICS);

List 5 generic properties of polymers, and briefly relate these properties to the atomic structure of polymers.

Consider the same TTT diagram and phase diagram for a eutectoid steel. TTT If a specimen of this steel is solutionized (aka, annealed to equilibrium) at 800°C, rapidly cooled to 300°C and is held at 300°C for 10 seconds, and is then quenched to room temperature, what constituents will make up the final microstructure? a. Bainite and Martensite b. Pearlite c. Martensite d. Austenite and Martensite e. Austenite f. Pearlite and Martensite g. Austenite and Pearlite h. Bainite

Consider a two-dimensional triangular lattice described by the two primitive vectors (in an orthogonal coordinate system

Find the two primitive lattice vectors describing the reciprocal lattice. Find the area of the 1st

Brillouin zone and its relation with the area of the direct lattice unit cell.

Consider a plane wall with uniform thermal energy generation per unit volume of qdot. Starting with the steady-state heat equation, obtain a general expression for the temperature distribution (Since no boundary conditions are provided, there will be unknown constants in the resulting equation).

How many times longer than the time constant tau is safe to assume dynamics completed?

(assuming this is talking about order systems...)

safety rules in operating farm tractor with trailer before, during, and after operation

How will you decide a particular CNC machine for a particular operation ?

A person cuts a piece of Bronze that is 5" long with a 2.5" diameter down to 2.100 Dia.

It is done in 2 roughing passes and 1 finishing pass.

First pass from 2.5" to 2.3"

Second Pass from 2.3" to 2.110"

Third pass from 2.110" to 2.100"

What is the machine cutting time (in seconds)?

CS= 110 fpm for roughing and 140 fpm for finishing

Feed = .02 "/rev for roughing and .01"/rev for finishing