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Difference between revisions of "Human Vibration"
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======Se====== | ======Se====== | ||
The Se is the compressive stress on the human spine. It is calculated by the combination the Dk in the three direction. Therefore, it will only be calculated if sensors are defined in the "Select Direction" window. One value of Se will be calculated for each sensor by the formula : <br> | The Se is the compressive stress on the human spine, expressed in MPa. It is calculated by the combination the Dk in the three direction. Therefore, it will only be calculated if sensors are defined in the "Select Direction" window. One value of Se will be calculated for each sensor by the formula : <br> | ||
<math display="block" forcemathmode="5">Se = \sqrt[6]{\sum_{k=X,Y,Z}(D_{k}*m_{k})^6}</math> <br> | <math display="block" forcemathmode="5">Se = \sqrt[6]{\sum_{k=X,Y,Z}(D_{k}*m_{k})^6}</math> <br> | ||
Where <math>m_{X} = 0,015 MPa/(m/ | Where <math>m_{X} = 0,015</math> MPa/(m/s²), <math>m_{Y} = 0,035</math> MPa/(m/s²) and <math>m_{Z} = 0,032</math> MPa/(m/s²). <br> | ||
To evaluate the lumbar stress over a daily exposition time, the Se(T) will also be calculated as : <br> | To evaluate the lumbar stress over a daily exposition time, the Se(T) will also be calculated as : <br> | ||