ｔhat welded joints’ impact toughness and dynamicfracture toughness are affected by welded matching, zoneand loading rate. It is not safe that designing weldedjoins with impact loading under traditional intensitytheory. One should pay more attention to welded joints’impact toughness and dynamic fracture toughness.Key words: welded joints; impact loading; fracturetoughness
Study And Application On Driving Torque Of InternalCombustion Engine
Abstract: Fluctuation of phase of single harmonic drivingtorque is studied, and the relationship between phase ofsingle crankshaft harmonic torsion vibration and that ofcorresponding harmonic driving torque is described.When torsion vibration is calculating, the phase ofdriving torque must be taken into account. The approachusing phase of crankshall harmonic torsion vibration todiagnose the individual cylinder fault is developedfurther.
Key words: phase; torsion vibration; fault diagnosisStudy On The Dynamic Performance Test System OfAutomotive Suspension
Abstract: This paper focuses on the function augment ofthe mechanism suspension performance test rig systemby using computer to control transducer atomatically,The expanded system can meet the requirements ofautomotive suspension’s dynamic performance test. Andthe system identification theory is applied into thesuspension’s modeling in order to simulate the suspension in random stimulus and in various inputs, sothe suspension’s dynamic performance can be estimatedsystematically. It proves to be a more perfect dynamicperformance test system of suspension.
Key words: suspension; transducer; system identifitalion; dynamic performance; test rig
Ｍａｃｈｉｎｅ Ｔｏｏｌ Ｄｙｎａｍｉｃｓ
Analysis Of Dynamic Characteristics For High-speed Spindle Double-rotors System On Nc LatheAbstract: Ｔｈｅ ｎａｔｕｒａｌ ｆｒｅｑｕｅｎｃｙ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆ ｔｈｅ ｈｉｇｈ－ｓｐｅｅｄ ｓｙｓｔｅｍ ｏｎ ＮＣ ｌａｔｈｅ ｗｅｒｅａｎａｌｙｚｅｄ ｂｙ ｔｈｅ ｗｈｏｌｅ ｔｒａｎｓｆｅｒ ｍａｔｒｉｘ ｍｅｔｈｏｄ
for the first time. According to the results, the spindlesystem can work safely and stably because its highestrotating speed is far below the first natural frequency ofthe system. At same time, the coupling stiffness of doublerotors were figured out by the FEM, which provides avalid method for the similar problems.
Key words: whole transfer matrix method; couplingmatrix; supporting stiffness; natural frequency; mainmode; FEM
Research On Kinematics Simulation Of High SpeedAnd Precision Numerical Control Lathe
Abstract: Ｂａｓｅｄ ｏｎ ｔｈｅ ｐｒｉｎｃｉｐｌｅ ｏｆ ｖｉｒｔｕａｌ ｐｒｏｔｏｔｙｐｉｎｇ，ｔｈｅ ｋｉｎｅｍａｔｉｃｓ ｓｉｍｕｌａｔｉｏｎ ｏｆ ｔｈｅ ｌａｔｈｅ ｈａｓ ｂｅｎ ｒｅａｌｉｚｅｄａｎｄ ｔｈｅ ｓｃｉｅｎｔｉｆｉｃ ｂａｓｉｓ ｆｏｒ ｄｅｓｉｇｎｉｎｇ ａｎｄ ｏｐｔｉｍｉｚｉｎｇｑｕｉｃｋｌｙ ｌａｔｈｅ ｈａｓ ｂｅｅｎ ｐｒｏｖｉｄｅｄ． Ａｎｄ ｔｈｅ ｄｅｓｉｇｎｅｒ ｃｏｕｌｄｎｏｔ ｏｎｌｙ ｏｂｓｅｒｖｅ ｔｈｅ ｔｈｒｅｅ－ｄｉｍｅｎｓｉｏｎ ｄｙｎａｍｉｃ ｄｉｓｐｌａｙａｎｄ ｍｏｖｅｍｅｎｔ ｃｏｕｒｓｅ ｏｆ ｔｈｅ ｗｈｏｌｅ ｌａｔｈｅ ｉｎ ｔｈｅ ｖｉｒｔｕａｌｃｉｒｃｕｍｓｔａｎｃｅ ｂｕｔ ａｌｓｏ ｆｏｒｅｃａｓｔ ａｃｃｕｒａｔｅｌｙ ａｎｄ ｉｍｐｒｏｖｅｐｒｏｂｌｅｍｓ ｗｈｉｃｈ ａｐｐｅａｒ ｐｏｓｓｉｂｌｙ ｄｕｒｉｎｇ ｄｅｓｉｇｎ ｂｅｆｏｒｅｐｒｏｔｏｔｙｐｅ ｗｉｌｌ ｂｅ ｍａｎｕｆａｃｔｕｒｅｄ， ａｓｓｕｒｅ ｔｈｅ ｆｅａｓｉｂｉｌｉｔｙ ｏｆｄｅｓｉｇｎ ｓｃｈｅｍｅ， ｓｈｏｒｔｅｎ ｐｅｒｉｏｄ ｏｆ ｐｒｏｄｕｃｔ ｄｅｓｉｇｎ ａｎｄｒｅｄｕｃｅ ｐｒｏｄｕｃｔ ｃｏｓｔ．
Key w ords: ｍｕｔｉｌ－ｂｏｄｙ ｋｉｎｅｍａｔｉｃｓ； ｖｉｒｔｕａｌ ｐｒｏｔｏｔｙｐｉｎｇ；ｎｕｍｅｒｉｃａｌ ｃｏｎｔｒｏｌ ｌａｔｈｅ； ｋｉｎｅｍａｔｉｃｓ ｓｉｍｕｌａｔｉｏｎMechanical Structural Staticl/Dynastic OptimizationDesign Based On Finite Element Analysis
Abstract: Ｓｔｒｕｃｔｕｒａｌ ｓｔａｔｉｃ／ｄｙｎａｓｔｉｃ ｐｒｏｐｅｒｔｙ ｏｆｍｅｃｈａｎｉｃａｌ ｐｒｏｄｕｃｔ ｉｓ ｒｅｌａｔｅｄ ｔｏ ｉｔｓ ｃａｐａｂｉｌｉｔｙ ａｎｄ ｑｕａｌｉｔｙ．Ｖａｒｉａｔｉｏｎａｌ ｄｅｓｉｇｎ ｍｅｔｈｏｄ ａｎｄ ｉｔｓ ａｐｐｌｉｃａｔｉｏｎ ｏｎｓｔｒｕｃｔｕｒａｌ ｓｔａｔｉｃ／ｄｙｎａｓｔｉｃ ｄｅｓｉｇｎ ｉｓ ｄｉｓｃｕｓｓｅｄ． Ｗｈａｔ ａｒｅｕｓｉｎｇ ｑｕａｓｉ－ｓｔａｔｉｃ ｖａｒｉａｔｉｏｎａｌ ｄｅｓｉｇｎ ｐｒｏｃｅｓｓｅｓ ｔｏ ｉｎｃｒｅａｓｅｓｔｉｆｆｎｅｓｓ ａｎｄ ｉｎｔｅｎｓｉｏｎ ｏｆ ｍｅｃｈａｎｉｃａｌ ｓｔｒｕｃｔｕｒｅ； ｉｍｐｒｏｖｅｓｄｙｎａｓｔｉｃ ｐｒｏｐｅｒｔｙ ｏｆ ｃｏｍｐｌｅｔｅ ｓｔｒｕｃｔｕｒｅ ｓｙｓｔｅｍ ｂｙｄｉｖｉｄｉｎｇ ｉｔ ｉｎｔｏ ｅｌｅｍｅｎｔ－ｓｔｒｕｃｔｕｒｅｓ ａｎｄ ｏｐｔｉｍｉｚｉｎｇ ｔｈｅｍ；ｏｂｔａｉｎｓ ｃｏｍｂｉｎｅ－ｓｕｒｆａｃｅ－ｐａｒａｍｅｔｅｒ ｆｏｒ ｆｉｎｉｔｅ ｅｌｅｍｅｎｔｍｏｄｅｌｉｎｇ ｏｆ ｃｏｍｐｌｅｔｅ ｍａｃｈｉｎｅ．
Key words: ｆｉｎｉｔｅ ｅｌｅｍｅｎｔｓ； ｖａｒｉａｔｉｏｎａｌ ｄｅｓｉｇｎ；ｍｅｃｈａｎｉｃａｌ ｓｔｒｕｃｔｕｒｅ； ｓｔａｔｉｃ／ｄｙｎａｓｔｉｃ； ｏｐｔｉｍｉｚａｔｉｏｎ ｄｅｓｉｇｎOptimized Design Of The Industrial CrystallierPropeller ’s Structure Base On CFD
Abstract: The structure of industrial crystallier propellerhas been analyzed. The influence rule of structuralparameters on the flow field is ｓｅａｒｃｈｅｄ ｔｏ ｄｅｔｅｒｍｉｎｅ
・ ０９ ・
ｔhat welded joints’ impact toughness and dynamicfracture toughness are affected by welded matching, zoneand loading rate. It is not safe that designing weldedjoins with impact loading under traditional intensitytheory. One should pay more attention to welded joints’impact toughness and dynamic fracture toughness.Key words: welded joints; impact loading; fracturetoughness
Study And Application On Driving Torque Of InternalCombustion Engine
Abstract: Fluctuation of phase of single harmonic drivingtorque is studied, and the relationship between phase ofsingle crankshaft harmonic torsion vibration and that ofcorresponding harmonic driving torque is described.When torsion vibration is calculating, the phase ofdriving torque must be taken into account. The approachusing phase of crankshall harmonic torsion vibration todiagnose the individual cylinder fault is developedfurther.
Key words: phase; torsion vibration; fault diagnosisStudy On The Dynamic Performance Test System OfAutomotive Suspension
Abstract: This paper focuses on the function augment ofthe mechanism suspension performance test rig systemby using computer to control transducer atomatically,The expanded system can meet the requirements ofautomotive suspension’s dynamic performance test. Andthe system identification theory is applied into thesuspension’s modeling in order to simulate the suspension in random stimulus and in various inputs, sothe suspension’s dynamic performance can be estimatedsystematically. It proves to be a more perfect dynamicperformance test system of suspension.
Key words: suspension; transducer; system identifitalion; dynamic performance; test rig
Ｍａｃｈｉｎｅ Ｔｏｏｌ Ｄｙｎａｍｉｃｓ
Analysis Of Dynamic Characteristics For High-speed Spindle Double-rotors System On Nc LatheAbstract: Ｔｈｅ ｎａｔｕｒａｌ ｆｒｅｑｕｅｎｃｙ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆ ｔｈｅ ｈｉｇｈ－ｓｐｅｅｄ ｓｙｓｔｅｍ ｏｎ ＮＣ ｌａｔｈｅ ｗｅｒｅａｎａｌｙｚｅｄ ｂｙ ｔｈｅ ｗｈｏｌｅ ｔｒａｎｓｆｅｒ ｍａｔｒｉｘ ｍｅｔｈｏｄ
for the first time. According to the results, the spindlesystem can work safely and stably because its highestrotating speed is far below the first natural frequency ofthe system. At same time, the coupling stiffness of doublerotors were figured out by the FEM, which provides avalid method for the similar problems.
Key words: whole transfer matrix method; couplingmatrix; supporting stiffness; natural frequency; mainmode; FEM
Research On Kinematics Simulation Of High SpeedAnd Precision Numerical Control Lathe
Abstract: Ｂａｓｅｄ ｏｎ ｔｈｅ ｐｒｉｎｃｉｐｌｅ ｏｆ ｖｉｒｔｕａｌ ｐｒｏｔｏｔｙｐｉｎｇ，ｔｈｅ ｋｉｎｅｍａｔｉｃｓ ｓｉｍｕｌａｔｉｏｎ ｏｆ ｔｈｅ ｌａｔｈｅ ｈａｓ ｂｅｎ ｒｅａｌｉｚｅｄａｎｄ ｔｈｅ ｓｃｉｅｎｔｉｆｉｃ ｂａｓｉｓ ｆｏｒ ｄｅｓｉｇｎｉｎｇ ａｎｄ ｏｐｔｉｍｉｚｉｎｇｑｕｉｃｋｌｙ ｌａｔｈｅ ｈａｓ ｂｅｅｎ ｐｒｏｖｉｄｅｄ． Ａｎｄ ｔｈｅ ｄｅｓｉｇｎｅｒ ｃｏｕｌｄｎｏｔ ｏｎｌｙ ｏｂｓｅｒｖｅ ｔｈｅ ｔｈｒｅｅ－ｄｉｍｅｎｓｉｏｎ ｄｙｎａｍｉｃ ｄｉｓｐｌａｙａｎｄ ｍｏｖｅｍｅｎｔ ｃｏｕｒｓｅ ｏｆ ｔｈｅ ｗｈｏｌｅ ｌａｔｈｅ ｉｎ ｔｈｅ ｖｉｒｔｕａｌｃｉｒｃｕｍｓｔａｎｃｅ ｂｕｔ ａｌｓｏ ｆｏｒｅｃａｓｔ ａｃｃｕｒａｔｅｌｙ ａｎｄ ｉｍｐｒｏｖｅｐｒｏｂｌｅｍｓ ｗｈｉｃｈ ａｐｐｅａｒ ｐｏｓｓｉｂｌｙ ｄｕｒｉｎｇ ｄｅｓｉｇｎ ｂｅｆｏｒｅｐｒｏｔｏｔｙｐｅ ｗｉｌｌ ｂｅ ｍａｎｕｆａｃｔｕｒｅｄ， ａｓｓｕｒｅ ｔｈｅ ｆｅａｓｉｂｉｌｉｔｙ ｏｆｄｅｓｉｇｎ ｓｃｈｅｍｅ， ｓｈｏｒｔｅｎ ｐｅｒｉｏｄ ｏｆ ｐｒｏｄｕｃｔ ｄｅｓｉｇｎ ａｎｄｒｅｄｕｃｅ ｐｒｏｄｕｃｔ ｃｏｓｔ．
Key w ords: ｍｕｔｉｌ－ｂｏｄｙ ｋｉｎｅｍａｔｉｃｓ； ｖｉｒｔｕａｌ ｐｒｏｔｏｔｙｐｉｎｇ；ｎｕｍｅｒｉｃａｌ ｃｏｎｔｒｏｌ ｌａｔｈｅ； ｋｉｎｅｍａｔｉｃｓ ｓｉｍｕｌａｔｉｏｎMechanical Structural Staticl/Dynastic OptimizationDesign Based On Finite Element Analysis
Abstract: Ｓｔｒｕｃｔｕｒａｌ ｓｔａｔｉｃ／ｄｙｎａｓｔｉｃ ｐｒｏｐｅｒｔｙ ｏｆｍｅｃｈａｎｉｃａｌ ｐｒｏｄｕｃｔ ｉｓ ｒｅｌａｔｅｄ ｔｏ ｉｔｓ ｃａｐａｂｉｌｉｔｙ ａｎｄ ｑｕａｌｉｔｙ．Ｖａｒｉａｔｉｏｎａｌ ｄｅｓｉｇｎ ｍｅｔｈｏｄ ａｎｄ ｉｔｓ ａｐｐｌｉｃａｔｉｏｎ ｏｎｓｔｒｕｃｔｕｒａｌ ｓｔａｔｉｃ／ｄｙｎａｓｔｉｃ ｄｅｓｉｇｎ ｉｓ ｄｉｓｃｕｓｓｅｄ． Ｗｈａｔ ａｒｅｕｓｉｎｇ ｑｕａｓｉ－ｓｔａｔｉｃ ｖａｒｉａｔｉｏｎａｌ ｄｅｓｉｇｎ ｐｒｏｃｅｓｓｅｓ ｔｏ ｉｎｃｒｅａｓｅｓｔｉｆｆｎｅｓｓ ａｎｄ ｉｎｔｅｎｓｉｏｎ ｏｆ ｍｅｃｈａｎｉｃａｌ ｓｔｒｕｃｔｕｒｅ； ｉｍｐｒｏｖｅｓｄｙｎａｓｔｉｃ ｐｒｏｐｅｒｔｙ ｏｆ ｃｏｍｐｌｅｔｅ ｓｔｒｕｃｔｕｒｅ ｓｙｓｔｅｍ ｂｙｄｉｖｉｄｉｎｇ ｉｔ ｉｎｔｏ ｅｌｅｍｅｎｔ－ｓｔｒｕｃｔｕｒｅｓ ａｎｄ ｏｐｔｉｍｉｚｉｎｇ ｔｈｅｍ；ｏｂｔａｉｎｓ ｃｏｍｂｉｎｅ－ｓｕｒｆａｃｅ－ｐａｒａｍｅｔｅｒ ｆｏｒ ｆｉｎｉｔｅ ｅｌｅｍｅｎｔｍｏｄｅｌｉｎｇ ｏｆ ｃｏｍｐｌｅｔｅ ｍａｃｈｉｎｅ．
Key words: ｆｉｎｉｔｅ ｅｌｅｍｅｎｔｓ； ｖａｒｉａｔｉｏｎａｌ ｄｅｓｉｇｎ；ｍｅｃｈａｎｉｃａｌ ｓｔｒｕｃｔｕｒｅ； ｓｔａｔｉｃ／ｄｙｎａｓｔｉｃ； ｏｐｔｉｍｉｚａｔｉｏｎ ｄｅｓｉｇｎOptimized Design Of The Industrial CrystallierPropeller ’s Structure Base On CFD
Abstract: The structure of industrial crystallier propellerhas been analyzed. The influence rule of structuralparameters on the flow field is ｓｅａｒｃｈｅｄ ｔｏ ｄｅｔｅｒｍｉｎｅ
・ ０９ ・