MBD Simulation on a Piston Assembly
AIM
IN this project we are going to Model all the parts piston assembly and then assemble them in SolidWorks. The motion analysis is going to be carried out in three different conditions,
| Sl.No |
Wrist Pin Offset ` |
Crank Speed (Rpm) |
| 1 | "0" mm | 2000 |
| 2 | 10 mm Positive | 2000 |
| 3 | 10 mm Negative | 2000 |
BASIC INRODUCTION OF PISTON ASSEMBLY : -
CRANK
Crankshaft is a part of the engine that helps you convert the linear motion of the Piston into rotary motion that can be delivered to the gearbox/wheels.
Without the crankshaft you can't transfer the reciprocating motion of pistons to the drive shaft.
CONNECTING ROD
connecting rod is a medium which is used to transmit reciprocating motion of piston in to rotatory motion of crank shaft.
WRIST PIN
a cylindrical boss or pin attached to the side of a wheel parallel with the axis esp one forming a bearing for a crank
PISTON
A piston is a moving disk enclosed in a cylinder which is made gas-tight by piston rings. The disk moves inside the cylinder as a liquid or gas inside the cylinder expands and contracts
MOVING ON OUR MODLING PART OF PISTON ASSEMBLY
CRANK
CONNECTIN ROD
SKECTH
WRIST PIN
PISTON
ASSEMBLY SECTION
impoting all part of piston assembly in assembly workspace of solidworks
- (01) applying mate and constrain for Wrist Pin "0" mm Offset
YOUTUBE LINK
PISTON ASSEMBLY WITH ZERO WRIST OFFSET
PLOT
Linear displacement of the Piston Head
in this graph we will see that the variation of lower limit and upper limit of displacement ia almost same . the displacement of piston head about to 88 in all time of iterval means the transmition of rotaty motion into the linear motion in each rotion are same or equal.
excel sheet
| piston-1 | |||
| Linear Displacement1 (mm) | |||
| Frame | Time | Ref. Coordinate System: | |
| 1 | 0.000 | 3.2987E+02 | |
| 2 | 0.000 | 3.2920E+02 | |
| 3 | 0.001 | 3.2661E+02 | |
| 4 | 0.001 | 3.2661E+02 | |
| 5 | 0.001 | 3.2419E+02 | |
| 6 | 0.002 | 3.2190E+02 | |
| 7 | 0.003 | 3.1596E+02 | |
| 8 | 0.003 | 3.1375E+02 | |
| 9 | 0.003 | 3.1144E+02 | |
| 10 | 0.003 | 3.0906E+02 | |
| 11 | 0.004 | 3.0151E+02 | |
| 12 | 0.005 | 2.9364E+02 | |
| 13 | 0.005 | 2.9364E+02 | |
| 14 | 0.006 | 2.8574E+02 | |
| 15 | 0.006 | 2.8574E+02 | |
| 16 | 0.007 | 2.7809E+02 | |
| 17 | 0.008 | 2.7093E+02 | |
| 18 | 0.008 | 2.7093E+02 | |
| 19 | 0.008 | 2.6443E+02 | |
| 20 | 0.009 | 2.6147E+02 | |
| 21 | 0.009 | 2.5873E+02 | |
| 22 | 0.010 | 2.5390E+02 | |
| 23 | 0.011 | 2.5001E+02 | |
| 24 | 0.012 | 2.4707E+02 | |
| 25 | 0.013 | 2.4510E+02 | |
| 26 | 0.013 | 2.4409E+02 | |
| 27 | 0.014 | 2.4406E+02 | |
| 28 | 0.014 | 2.4406E+02 | |
| 29 | 0.015 | 2.4457E+02 | |
| 30 | 0.015 | 2.4499E+02 | |
| 31 | 0.016 | 2.4688E+02 | |
| 32 | 0.017 | 2.4975E+02 | |
| 33 | 0.017 | 2.5154E+02 | |
| 34 | 0.018 | 2.5357E+02 | |
| 35 | 0.018 | 2.5357E+02 | |
| 36 | 0.018 | 2.5832E+02 | |
| 37 | 0.019 | 2.6397E+02 | |
| 38 | 0.020 | 2.7041E+02 | |
| 39 | 0.020 | 2.7389E+02 | |
| 40 | 0.021 | 2.7753E+02 | |
| 41 | 0.022 | 2.8514E+02 | |
| 42 | 0.022 | 2.8907E+02 | |
| 43 | 0.022 | 2.9144E+02 | |
| 44 | 0.023 | 2.9303E+02 | |
| 45 | 0.023 | 3.0092E+02 | |
| 46 | 0.023 | 3.0143E+02 | |
| 47 | 0.024 | 3.0347E+02 | |
| 48 | 0.024 | 3.0649E+02 | |
| 49 | 0.024 | 3.0850E+02 | |
| 50 | 0.024 | 3.0850E+02 | |
| 51 | 0.025 | 3.1546E+02 | |
| 52 | 0.025 | 3.1546E+02 | |
| 53 | 0.025 | 3.1808E+02 | |
| 54 | 0.026 | 3.2149E+02 | |
| 55 | 0.026 | 3.2174E+02 | |
| 56 | 0.026 | 3.2323E+02 | |
| 57 | 0.026 | 3.2480E+02 | |
| 58 | 0.027 | 3.2630E+02 | |
| 59 | 0.028 | 3.2967E+02 | |
| 60 | 0.028 | 3.3013E+02 | |
| 61 | 0.028 | 3.3143E+02 | |
| 62 | 0.028 | 3.3143E+02 | |
| 63 | 0.029 | 3.3150E+02 | |
| 64 | 0.029 | 3.3150E+02 | |
| 65 | 0.029 | 3.3121E+02 | |
| 66 | 0.030 | 3.2987E+02 | |
| 67 | 0.030 | 3.2987E+02 | |
| 68 | 0.031 | 3.2661E+02 | |
| 69 | 0.031 | 3.2661E+02 | |
| 70 | 0.032 | 3.2190E+02 | |
| 71 | 0.033 | 3.1596E+02 | |
| 72 | 0.033 | 3.1596E+02 | |
| 73 | 0.033 | 3.0906E+02 | |
| 74 | 0.034 | 3.0151E+02 | |
| 75 | 0.035 | 2.9760E+02 | |
| 76 | 0.035 | 2.9364E+02 | |
| 77 | 0.036 | 2.8574E+02 | |
| 78 | 0.037 | 2.7809E+02 | |
| 79 | 0.038 | 2.7093E+02 | |
| 80 | 0.038 | 2.7093E+02 | |
| 81 | 0.038 | 2.6443E+02 | |
| 82 | 0.039 | 2.5873E+02 | |
| 83 | 0.040 | 2.5390E+02 | |
| 84 | 0.040 | 2.5184E+02 | |
| 85 | 0.041 | 2.5001E+02 | |
| 86 | 0.041 | 2.5001E+02 | |
| 87 | 0.042 | 2.4707E+02 | |
| 88 | 0.042 | 2.4596E+02 | |
| 89 | 0.043 | 2.4510E+02 | |
| 90 | 0.043 | 2.4409E+02 | |
| 91 | 0.044 | 2.4406E+02 | |
| 92 | 0.044 | 2.4406E+02 | |
| 93 | 0.045 | 2.4499E+02 | |
| 94 | 0.045 | 2.4499E+02 | |
| 95 | 0.046 | 2.4688E+02 | |
| 96 | 0.046 | 2.4820E+02 | |
| 97 | 0.047 | 2.4975E+02 | |
| 98 | 0.047 | 2.5357E+02 | |
| 99 | 0.048 | 2.5832E+02 | |
| 100 | 0.049 | 2.6397E+02 | |
| 101 | 0.050 | 2.7041E+02 | |
| 102 | 0.050 | 2.7041E+02 | |
| 103 | 0.051 | 2.7479E+02 | |
| 104 | 0.051 | 2.7661E+02 | |
| 105 | 0.051 | 2.7753E+02 | |
| 106 | 0.051 | 2.7939E+02 | |
| 107 | 0.052 | 2.8514E+02 | |
| 108 | 0.052 | 2.8514E+02 | |
| 109 | 0.052 | 2.8828E+02 | |
| 110 | 0.052 | 2.9144E+02 | |
| 111 | 0.052 | 2.9303E+02 | |
| 112 | 0.053 | 3.0092E+02 | |
| 113 | 0.054 | 3.0256E+02 | |
| 114 | 0.054 | 3.0460E+02 | |
| 115 | 0.054 | 3.0850E+02 | |
| 116 | 0.055 | 3.1208E+02 | |
| 117 | 0.055 | 3.1546E+02 | |
| 118 | 0.055 | 3.1884E+02 | |
| 119 | 0.056 | 3.2045E+02 | |
| 120 | 0.056 | 3.2149E+02 | |
| 121 | 0.056 | 3.2213E+02 | |
| 122 | 0.056 | 3.2366E+02 | |
| 123 | 0.056 | 3.2531E+02 | |
| 124 | 0.057 | 3.2630E+02 | |
| 125 | 0.057 | 3.2694E+02 | |
| 126 | 0.057 | 3.2805E+02 | |
| 127 | 0.057 | 3.2967E+02 | |
| 128 | 0.057 | 3.2967E+02 | |
| 129 | 0.058 | 3.3045E+02 | |
| 130 | 0.058 | 3.3098E+02 | |
| 131 | 0.058 | 3.3143E+02 | |
| 132 | 0.059 | 3.3166E+02 | |
| 133 | 0.059 | 3.3150E+02 | |
| 134 | 0.059 | 3.3150E+02 | |
| 135 | 0.059 | 3.3123E+02 | |
| 136 | 0.060 | 3.3066E+02 | |
| 137 | 0.060 | 3.2987E+02 | |
| 138 | 0.060 | 3.2926E+02 | |
| 139 | 0.061 | 3.2781E+02 | |
| 140 | 0.061 | 3.2661E+02 | |
| 141 | 0.061 | 3.2661E+02 | |
| 142 | 0.062 | 3.2190E+02 | |
| 143 | 0.062 | 3.2190E+02 | |
| 144 | 0.062 | 3.1999E+02 | |
| 145 | 0.062 | 3.1596E+02 | |
| 146 | 0.063 | 3.0906E+02 |
angular velocity plot of crank @2000rpm
from above graph we are confrom or sure that our crank rotate with given angular veocity2000rpm.
here we clearly see that the velocity vary betweeen lower limit12000 and upper limit 12000 degree per sec means @ 2000rpm
- (02) applying mate and constrain for Wrist Pin 10 mm negative Offset
aseembly
proof of 10 mm negative offset
here we use measure scale from evolute tool to show the 10 mm negative offset is taken correcty
YOUTUBE LINK
PISTON ASSEMBLY WITH 10 mm NEGATIVE OFFSET
PLOT
Linear displacement of the Piston Head
in this graph we will see that the variation of lower limit and upper limit of displacement ia almost same . the displacement of piston head about to 100 in all time of iterval means the transmition of rotaty motion into the linear motion in each rotion are same or equal.
excel plot and sheet
| piston-1 | |||
| Linear Displacement1 (mm) | |||
| Frame | Time | Ref. Coordinate System: | |
| 1 | 0.000 | 3.0246E+02 | |
| 2 | 0.000 | 3.0235E+02 | |
| 3 | 0.001 | 3.0130E+02 | |
| 4 | 0.002 | 2.9833E+02 | |
| 5 | 0.003 | 2.9369E+02 | |
| 6 | 0.003 | 2.8760E+02 | |
| 7 | 0.004 | 2.8034E+02 | |
| 8 | 0.005 | 2.7637E+02 | |
| 9 | 0.005 | 2.7222E+02 | |
| 10 | 0.006 | 2.6357E+02 | |
| 11 | 0.007 | 2.5471E+02 | |
| 12 | 0.008 | 2.4596E+02 | |
| 13 | 0.008 | 2.3758E+02 | |
| 14 | 0.009 | 2.2981E+02 | |
| 15 | 0.010 | 2.2282E+02 | |
| 16 | 0.011 | 2.1674E+02 | |
| 17 | 0.012 | 2.1167E+02 | |
| 18 | 0.013 | 2.0767E+02 | |
| 19 | 0.013 | 2.0479E+02 | |
| 20 | 0.014 | 2.0304E+02 | |
| 21 | 0.015 | 2.0244E+02 | |
| 22 | 0.016 | 2.0301E+02 | |
| 23 | 0.017 | 2.0475E+02 | |
| 24 | 0.018 | 2.0766E+02 | |
| 25 | 0.018 | 2.1173E+02 | |
| 26 | 0.019 | 2.1692E+02 | |
| 27 | 0.020 | 2.2317E+02 | |
| 28 | 0.021 | 2.3039E+02 | |
| 29 | 0.022 | 2.3841E+02 | |
| 30 | 0.023 | 2.4705E+02 | |
| 31 | 0.023 | 2.5603E+02 | |
| 32 | 0.024 | 2.6506E+02 | |
| 33 | 0.025 | 2.7381E+02 | |
| 34 | 0.026 | 2.8192E+02 | |
| 35 | 0.027 | 2.8905E+02 | |
| 36 | 0.028 | 2.9489E+02 | |
| 37 | 0.028 | 2.9919E+02 | |
| 38 | 0.029 | 3.0175E+02 | |
| 39 | 0.030 | 3.0246E+02 | |
| 40 | 0.031 | 3.0130E+02 | |
| 41 | 0.032 | 2.9833E+02 | |
| 42 | 0.033 | 2.9369E+02 | |
| 43 | 0.033 | 2.8760E+02 | |
| 44 | 0.034 | 2.8034E+02 | |
| 45 | 0.035 | 2.7222E+02 | |
| 46 | 0.036 | 2.6357E+02 |
Angular velocity plot of crank @2000rpm
from above graph we are confrom or sure that our crank rotate with given angular veocity2000rpm.
here we clearly see that the velocity vary betweeen lower limit12000 and upper limit 12000 degree per sec means @ 2000rpm
- (03) applying mate and constrain for Wrist Pin 10 mm negative Offset
aseembly
applying 10 mm positive offset
proof of 10 mm negative offset
here we use measure scale from evolute tool to show the 10 mm POSITIVE offset is taken correcty
YOUTUBE LINK
PISTON ASSEMBLY WITH 10 mm POSITIVE OFFSET
PLOT
Linear displacement of the Piston Head
in this graph we will see that the variation of lower limit and upper limit of displacement ia almost same . the displacement of piston head about to 100 in all time of iterval means the transmition of rotaty motion into the linear motion in each rotion are same or equal.
xcel plot and sheet
| piston-1 | |||
| Linear Displacement1 (mm) | |||
| Frame | Time | Ref. Coordinate System: | |
| 1 | 0.000 | 3.0246E+02 | |
| 2 | 0.000 | 3.0235E+02 | |
| 3 | 0.001 | 3.0130E+02 | |
| 4 | 0.002 | 2.9833E+02 | |
| 5 | 0.003 | 2.9369E+02 | |
| 6 | 0.003 | 2.8760E+02 | |
| 7 | 0.004 | 2.8034E+02 | |
| 8 | 0.005 | 2.7637E+02 | |
| 9 | 0.005 | 2.7222E+02 | |
| 10 | 0.006 | 2.6357E+02 | |
| 11 | 0.007 | 2.5471E+02 | |
| 12 | 0.008 | 2.4596E+02 | |
| 13 | 0.008 | 2.3758E+02 | |
| 14 | 0.009 | 2.2981E+02 | |
| 15 | 0.010 | 2.2282E+02 | |
| 16 | 0.011 | 2.1674E+02 | |
| 17 | 0.012 | 2.1167E+02 | |
| 18 | 0.013 | 2.0767E+02 | |
| 19 | 0.013 | 2.0479E+02 | |
| 20 | 0.014 | 2.0304E+02 | |
| 21 | 0.015 | 2.0244E+02 | |
| 22 | 0.016 | 2.0301E+02 | |
| 23 | 0.017 | 2.0475E+02 | |
| 24 | 0.018 | 2.0766E+02 | |
| 25 | 0.018 | 2.1173E+02 | |
| 26 | 0.019 | 2.1692E+02 | |
| 27 | 0.020 | 2.2317E+02 | |
| 28 | 0.021 | 2.3039E+02 | |
| 29 | 0.022 | 2.3841E+02 | |
| 30 | 0.023 | 2.4705E+02 | |
| 31 | 0.023 | 2.5603E+02 | |
| 32 | 0.024 | 2.6506E+02 | |
| 33 | 0.025 | 2.7381E+02 | |
| 34 | 0.026 | 2.8192E+02 | |
| 35 | 0.027 | 2.8905E+02 |
Angular velocity plot of crank @2000rpm
Superimpose all the three graph
here we can se that 0ffset have small dispacement of piston head on other hand 10 positive and 10 negative offset have grater dispacement of piston head as compair to o offset