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Effects of Pretightening Force on Response of Displacement Loading of Tightened Bolted Joint Plate
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    Abstract:

    The effects of pretightening force on the equivalent stiffness and the critical response of micro and macro sliding of the bolted joint were investigated in order to realize the tightening and reliability of bolted joints.A singlelap single bolted joint plate was used to analyze the relation of contact pressure of joint surfaces and the pretightening forces,its equivalent stiffness model was built by analyzing the characteristic of the displacementloading,a parametric finite element model of the singlelap and single bolted joint plate with a variable pretightening force was developed,and a calculation method of response of displacementloading was proposed.The effects of pretightening force on the response of displacementloading of bolted joint plate at micro sliding phase,as well as the equivalent stiffness and the critical response amplitude of micro and macro sliding were discussed.Results indicate that when the response amplitude of displacementloading of the free end of the bolted joint plate is smaller than 0.075 mm,the pretightening force has no influence on the response of displacementloading,and the equivalent stiffness of the bolted joint plate is getting harder.When the response amplitude of displacementloading is greater than 0075 mm,the pretightening force has obvious influence on equivalent stiffness.There is an approximate linear relationship between the critical response amplitude of micro and macro sliding and the pretightening force.When the pretightening force is \[0.15~0.33\] F0max(F0maxis the maximum pretightening force) or \[0.45 ~ 0.70\] F0max,the pretightening force has less influence on equivalent stiffness,while the effect of pretightening force on the equivalent stiffness reaches to 50%.The conclusions show that the critical response amplitude and the equivalent stiffness of the bolted joint plate can be adjusted by changing the prettightening force.It is very helpful to the design of bolted joint plate by considering both of them.

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刘文光.预紧力对紧螺栓连接板位移载荷响应的影响[J].润滑与密封英文版,2018,43(3):75-80.

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  • Received:
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  • Online: April 24,2018
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