moment rotation behaviour on approach to design and analysis

... buckling and cross-section classification Introduction; Cross-sectional dimensions and moment rotation behaviour; Effect of moment rotation behaviour on approach to design and analysis; Classification ... SECTION 7: CONSTRUCTION 31 Tolerances Introduction; Standards; Implications of tolerances; Fabrication tolerances; Erection tolerances 917 32 Fabrication Introduction; Economy of fabrication; ... examples 383 15 Columns and struts Introduction; Common types of member; Design considerations; Cross-sectional considerations; Compressive resistance; Torsional and flexural-torsional buckling; Effective...

Ngày tải lên: 23/03/2014, 21:09

... with a contact ratio well below it is only possible to optimise for one "design" condition but as soon as the contact ratio exceeds then there can be two conditions in which zero T.E is theoretically ... and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration and noise in spur gears.' British Gear Association Congress, 1995, Suite 45, IMEX Park, Shobnall Rd., Burton on ... his "design" load will be the maximum that the drive can take If, however, noise is the critical factor, "design load" may refer to the condition where noise has to be a minimum and may be only...

Ngày tải lên: 13/12/2013, 03:15

... Vibration: A Basic Approach to Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and ... Graphics and Design: Second Edition, Daniel L Ryan 39 Electronically Controlled Proportional Valves: Selection and Application, Michael J Tonyan, edited by Tobi Goldoftas 40 Pressure Gauge Handbook, ... Analysis in Engineering Design: Second Edition, Revised and Expanded, Alexander Blake 70 An Introduction to the Design and Behavior of Bolted Joints: Second Edition, Revised and Expanded, John H Bickford...

Ngày tải lên: 13/12/2013, 03:15

... by MIL-STD 3007 and provides planning, design, construction, sustainment, restoration, and modernization criteria, and applies to the Military Departments, the Defense Agencies, and the DoD Field ... qualified designers the criteria and guidance required for design and construction of those features related to noise and vibration control of mechanical equipment systems most commonly encountered ... Vibration Isolation Mounting for Boilers Vibration Isolation Mounting for Propeller-Type Cooling Towers Vibration Isolation Mounting for Centrifugal-Type Cooling Towers Vibration Isolation Mounting...

Ngày tải lên: 28/03/2014, 18:20

... Vibration: A Basic Approach to Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and ... Graphics and Design: Second Edition, Daniel L Ryan 39 Electronically Controlled Proportional Valves: Selection and Application, Michael J Tonyan, edited by Tobi Goldoftas 40 Pressure Gauge Handbook, ... Analysis in Engineering Design: Second Edition, Revised and Expanded, Alexander Blake 70 An Introduction to the Design and Behavior of Bolted Joints: Second Edition, Revised and Expanded, John H Bickford...

Ngày tải lên: 03/07/2014, 12:20

... excitation which will determine the vibration levels in operation As soon as load is applied there are two regimes, one around the pitch point where only one pair of teeth are in contact and one ... with a contact ratio well below it is only possible to optimise for one "design" condition but as soon as the contact ratio exceeds then there can be two conditions in which zero T.E is theoretically ... and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration and noise in spur gears.' British Gear Association Congress, 1995, Suite 45, IMEX Park, Shobnall Rd., Burton on...

Ngày tải lên: 03/07/2014, 12:20

... Vibration: A Basic Approach to Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and ... Graphics and Design: Second Edition, Daniel L Ryan 39 Electronically Controlled Proportional Valves: Selection and Application, Michael J Tonyan, edited by Tobi Goldoftas 40 Pressure Gauge Handbook, ... Analysis in Engineering Design: Second Edition, Revised and Expanded, Alexander Blake 70 An Introduction to the Design and Behavior of Bolted Joints: Second Edition, Revised and Expanded, John H Bickford...

Ngày tải lên: 05/08/2014, 09:20

... Vibration: A Basic Approach to Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and ... Graphics and Design: Second Edition, Daniel L Ryan 39 Electronically Controlled Proportional Valves: Selection and Application, Michael J Tonyan, edited by Tobi Goldoftas 40 Pressure Gauge Handbook, ... Analysis in Engineering Design: Second Edition, Revised and Expanded, Alexander Blake 70 An Introduction to the Design and Behavior of Bolted Joints: Second Edition, Revised and Expanded, John H Bickford...

Ngày tải lên: 05/08/2014, 09:20

... occupants Vibration travelling along te input and output shafts to cause trouble can aalso occur but is less common Causes of Noise Thermal distortions Pinion distortion -I

Ngày tải lên: 05/08/2014, 09:20

... occupants Vibration travelling along te input and output shafts to cause trouble can aalso occur but is less common Causes of Noise Thermal distortions Pinion distortion -I

Ngày tải lên: 05/08/2014, 09:20

... metal to metal contact are the conditions which give high friction and associated vibration These conditions should be avoided as far as possible in service as they are also the conditions associated ... and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration and noise in spur gears.' British Gear Association Congress, 1995, Suite 45, IMEX Park, Shobnall Rd., Burton on ... are more likely to be bearing limitations so it is common to use double helical gears or thrust cones to take out the axial forces Thrust cones are not common and require skill to get the details...

Ngày tải lên: 05/08/2014, 09:20

... metal to metal contact are the conditions which give high friction and associated vibration These conditions should be avoided as far as possible in service as they are also the conditions associated ... and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration and noise in spur gears.' British Gear Association Congress, 1995, Suite 45, IMEX Park, Shobnall Rd., Burton on ... are more likely to be bearing limitations so it is common to use double helical gears or thrust cones to take out the axial forces Thrust cones are not common and require skill to get the details...

Ngày tải lên: 05/08/2014, 09:20

... analysis needs to take into account shear effects and pinion bending and can allow for variable loading along the contact line 4.7 Design options for low noise When designing standard spur gears ... The x direction is the axial direction and y is along the pressure plane in the direction of motion of the contact points Prediction of Static T.E 45 Wheel limit of pinion tip contact limit ... program and a contact load of 20,OOON (2 tons) The average value of deflection is due to elastic tooth deflections and is ignored since it is only the vibrating variation that is important for noise...

Ngày tải lên: 05/08/2014, 09:20

... analysis needs to take into account shear effects and pinion bending and can allow for variable loading along the contact line 4.7 Design options for low noise When designing standard spur gears ... The x direction is the axial direction and y is along the pressure plane in the direction of motion of the contact points Prediction of Static T.E 45 Wheel limit of pinion tip contact limit ... program and a contact load of 20,OOON (2 tons) The average value of deflection is due to elastic tooth deflections and is ignored since it is only the vibrating variation that is important for noise...

Ngày tải lên: 05/08/2014, 09:20

... interpolation and extrapolation to reduce computational effort This is no longer necessary and it is simpler to take shorter time intervals to check accuracy or to ensure convergence 5.3 Starting conditions ... milliseconds Fig 5.4 Prediction of variation of pinion displacement with time The total mesh force ff is generated in line 33 and is stored for plotting and to be used to calculate accelerations ... good idea to set all starting values to zero since torsionally soft shafts will have to wind up (and deflect sideways) a large amount to take up the steady components of deflection to get bearing...

Ngày tải lên: 05/08/2014, 09:20

... particular torque will have a T.E of, say, um at once-per-tooth meshing frequency, regardless of rotation frequency B 2/tooth 3/tooth frequency Fig 6.6 Sketch of responses to T.E excitation as tooth ... several variations possible on this theme and alternatively each encoder pulse train may be demodulated in the computer to extract the torsional vibration Sweeney and Randall [3] and Remond [4] describe ... isolating at low torque 6.7 Once per revolution marker It is a very great advantage for detailed noise investigations to have an accurate once-per-revolution marker on at least one shaft, and preferably...

Ngày tải lên: 05/08/2014, 09:20

... particular torque will have a T.E of, say, um at once-per-tooth meshing frequency, regardless of rotation frequency B 2/tooth 3/tooth frequency Fig 6.6 Sketch of responses to T.E excitation as tooth ... several variations possible on this theme and alternatively each encoder pulse train may be demodulated in the computer to extract the torsional vibration Sweeney and Randall [3] and Remond [4] describe ... isolating at low torque 6.7 Once per revolution marker It is a very great advantage for detailed noise investigations to have an accurate once-per-revolution marker on at least one shaft, and preferably...

Ngày tải lên: 05/08/2014, 09:20

... rotational speed while the variations correspond to the torsional vibration At each transition from +n/2 to - n/2 the analysis needs to add the value TL 102 Chapter This method is difficult to ... 101 If on the other hand a test rig is set up to test a particular drive, the settings remain constant and the only requirement is for the operator to centralise the trace on the monitor This ... done by computer control (b) Unusual tooth numbers with large numbers of teeth give too coarse a frequency resolution to pick out harmonics of tooth frequency If, for example, a 68 tooth pinion...

Ngày tải lên: 05/08/2014, 09:20

... rotational speed while the variations correspond to the torsional vibration At each transition from +n/2 to - n/2 the analysis needs to add the value TL 102 Chapter This method is difficult to ... 101 If on the other hand a test rig is set up to test a particular drive, the settings remain constant and the only requirement is for the operator to centralise the trace on the monitor This ... done by computer control (b) Unusual tooth numbers with large numbers of teeth give too coarse a frequency resolution to pick out harmonics of tooth frequency If, for example, a 68 tooth pinion...

Ngày tải lên: 05/08/2014, 09:20