A finite element model was established for analyzing the geometric errors in turning operations and a two-step analyzing process was proposed. In the first analyzing step, the cutting force and the cutting heat for th...A finite element model was established for analyzing the geometric errors in turning operations and a two-step analyzing process was proposed. In the first analyzing step, the cutting force and the cutting heat for the cutting conditions were obtained using the AdvantEdge. Also, the deformation of a workpiece was estimated in the second step using the ANSYS. The deformation was analyzed for a 150 mm-long workpiece at three different measuring points, such as 10, 70 and 130 mm from a reference point, and the amounts of the deformation were compared through experiments. /n the results of the comparison and analysis, the values obtained from these comparison and analysis represent similar tendencies. Also, it is verified that their geometric errors increase with the increase in temperature. In addition, regarding the factors that affect the deformation of a workpiecc, it can be seen that the geometric error in the lathe is about 15%, the error caused by the cutting force is about 10%, and the deformation caused by the heat is about 75%.展开更多
We study the particle-triaxial-rotor model rotational energy spectrum and with variable moment of inertia deformation feature of very heavy nucleus 249Cm in the band structure and high spin states and locating very ne...We study the particle-triaxial-rotor model rotational energy spectrum and with variable moment of inertia deformation feature of very heavy nucleus 249Cm in the band structure and high spin states and locating very near the we determine the configurations and quadrupole and triaxial calculated results indicate that the high spin band of 249Cm is Such a nucleus is the unique one involving both multisuperheavy region. By calculating the energy spectrum, deformation parameters β and γ of the nucleus. The built upon the v[620]1/2＋ configuration with deformation 1- configuration respectively parameters β= 0.296 and γ = 7.5° and the bands based on the v[622]3/2＋,v[613]7/2＋, v[750]1/2- are also the ones with quite large axial deformation but small triaxial deformation.展开更多
The theoretical light curves of contact binaries are calculated with and without putting in the contact binary evolution model.Firstly,we do not use the contact binary evolution model.A comparison of the light curve i...The theoretical light curves of contact binaries are calculated with and without putting in the contact binary evolution model.Firstly,we do not use the contact binary evolution model.A comparison of the light curve is performed with and without the deformation caused by rotation and tides.It shows that the light curve presents many differences,especially on the bottom and top.Secondly,we adopt the contact binary model [Huang R Q,et al.Chin J Astron Astrophys,2007,7:235-244;Song H F,et al.Chin J Astron Astrophys,2007,7:539-550] and compute the theoretical light curve with and without rotational and tidal effects by studying three binary systems(with low-,intermediate-and high-mass components).The bottom and top of the theoretical light curves are discussed and compared to observations.The results show that taking into account the rotational effect has a better agreement with observations than without it.Therefore,the deformation of the light curve of contact binaries caused by rotation and tides is very important.Meanwhile,the rotational and tidal effect can advance the start of the semi-detached,contact phase and the time of mass-reversal.展开更多
基金Project(RTI04-01-03) supported by the Regional Technology Innovation Program of the Ministry of Knowledge Economy (MKE),Korea
文摘A finite element model was established for analyzing the geometric errors in turning operations and a two-step analyzing process was proposed. In the first analyzing step, the cutting force and the cutting heat for the cutting conditions were obtained using the AdvantEdge. Also, the deformation of a workpiece was estimated in the second step using the ANSYS. The deformation was analyzed for a 150 mm-long workpiece at three different measuring points, such as 10, 70 and 130 mm from a reference point, and the amounts of the deformation were compared through experiments. /n the results of the comparison and analysis, the values obtained from these comparison and analysis represent similar tendencies. Also, it is verified that their geometric errors increase with the increase in temperature. In addition, regarding the factors that affect the deformation of a workpiecc, it can be seen that the geometric error in the lathe is about 15%, the error caused by the cutting force is about 10%, and the deformation caused by the heat is about 75%.
基金Supported by the National Natural Science Foundation of China under Grant Nos. 10935001 and 11075052the National Fund for Fostering Talents of Basic Science with Grant No. J1030310the Major State Basic Research Development Program under Grant No. G2007CB815000
文摘We study the particle-triaxial-rotor model rotational energy spectrum and with variable moment of inertia deformation feature of very heavy nucleus 249Cm in the band structure and high spin states and locating very near the we determine the configurations and quadrupole and triaxial calculated results indicate that the high spin band of 249Cm is Such a nucleus is the unique one involving both multisuperheavy region. By calculating the energy spectrum, deformation parameters β and γ of the nucleus. The built upon the v[620]1/2＋ configuration with deformation 1- configuration respectively parameters β= 0.296 and γ = 7.5° and the bands based on the v[622]3/2＋,v[613]7/2＋, v[750]1/2- are also the ones with quite large axial deformation but small triaxial deformation.
基金supported by the National Natural Science Foundation of China (Grant No.10933002)
文摘The theoretical light curves of contact binaries are calculated with and without putting in the contact binary evolution model.Firstly,we do not use the contact binary evolution model.A comparison of the light curve is performed with and without the deformation caused by rotation and tides.It shows that the light curve presents many differences,especially on the bottom and top.Secondly,we adopt the contact binary model [Huang R Q,et al.Chin J Astron Astrophys,2007,7:235-244;Song H F,et al.Chin J Astron Astrophys,2007,7:539-550] and compute the theoretical light curve with and without rotational and tidal effects by studying three binary systems(with low-,intermediate-and high-mass components).The bottom and top of the theoretical light curves are discussed and compared to observations.The results show that taking into account the rotational effect has a better agreement with observations than without it.Therefore,the deformation of the light curve of contact binaries caused by rotation and tides is very important.Meanwhile,the rotational and tidal effect can advance the start of the semi-detached,contact phase and the time of mass-reversal.
