This guide has been released to have fun the 19th anniversary of the Termomeccanica origin. the purpose is to supply novices with an device to aid them process the sphere of centrifugal pumps, and more matured individuals with a good aid of their day-by-day paintings. we wish to take the chance to specific our because of the contributors of the layout. Engineering, Product improvement, caliber coverage and After revenues carrier Departments, who've made a vital contribution in moving and condensing the event of the corporate into this instruction manual.
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This comparison shows a good agreement. 6-15) the dependency of the friction coefficient with respect to the load, kinematics, material and geometry parameters of the contact bodies can be seen. [f the contact is complex with regard to these parameters, a common method is to identify the friction coefficient within a stationary process by an experimental setup with respect to the normal load and the relative velocity, see (Hinrichs [997a). 7 Three-dimensional Point Contact Element SS X, /1 Fig.
2-1) this leads to Gw"(x,t) = PoW(x,/). ) = O. Similar to the procedure described above the angular eigenfrequencies for the tangential vibration modes are given by OJ n E:~ - , k = 1,2,3, .... n = (2k -/)-. 2-6). 2-28) Llm 110 = PoLlAr/ () . Note, that the eigenfrcquencies of the elastic layer are not dependent on the contact area. 3 Surface Roughness The surface roughness has an effect on the normal force-displacement relationship, which can not be neglected. In (Greenwood and Williamson 1966; Greenwood 1984; Johnson 1989; Zavarise et al.
3-23) Rz Hence, the normal force is proportional to the overlapping volume. 3-21) gives iJF~ = iJFN* = U, - 0 for * u: < 0, . '2} jor * ur > 1. 3-24) In Fig. 3-8, the nonlinear behavior of the dimensionless normal contact force with respect to the relative normal displacement is shown. For a relative normal displacement of u,*>l the behavior is linear, because the complete contact area carries the load and for u,*