某轻型越野车离合器系统专项性能试验开发与验证

针对某轻型越野车离合器踏板力沉重的问题,对离合器分离力进行优化。结合用户使用场景,从零部件、系统、整车多层级考虑,制定离合器系统专项性能试验方案,并进行实车验证,结果表明优化方案可降低踏板力,离合器系统满足设计要求。     

线束工装板图绘制浅析

文章针对线束产品加工过程中组装工序使用到的工装板图的绘制过程要点进行阐述。针对车型、订单的特殊性、稳定性,对工装板图的绘制过程进行了进一步说明。为工装板图及治具工装板的设计过程提供理论指导。对工装治具工装板图的设计提出特殊要求。     

大型绞吸式挖泥船定位钢桩插销孔应力及疲劳分析

对定位桩插销孔处的结构进行研究,分析插销孔的应力及疲劳问题。首先分析插销孔处易发生断裂的定位钢桩的结构形式,对销孔处的结构提出2种改进方案;然后,对2种改进的插销孔进行强度计算,根据计算结果并结合实际生产确定出较好的结构形式;最后,对改进后的销孔进行疲劳分析,得到其疲劳寿命,并指出最易发生疲劳失效的部位。     

简要介绍线束工装图板绘制规范

文章针对线束产品加工过程中组装工序使用到的工装图板绘制规范要求进行阐述。为规范图板制作,确保图板正确的指导生产,更好地服务于生产,对工装图板的设计过程提供理论指导。     

超深水铺排作业计算方法与结果分析

基于非线性有限元软件ABAQUS,对超深水铺排作业时排体所受水流力进行模拟计算,给出了简化公式。对翻板端软体排所受水平力及垂直力进行比较分析,结果表明在工程实际中可以使用该简化公式对水平力进行估算以及使用软体排重力与浮力之差对垂直力进行估算,此外垂直力引起的横倾角需要在铺排过程中调整压载。     

Research on Dynamic Response Characteristics of 6MW Spar-Type Floating Offshore Wind Turbine

A 6 MW spar-type floating offshore wind turbine(FOWT) model is put forward and a fully coupled aero-hydro-servo-elastic time domain model is established in the fatigue,aerodynamics,structures and turbulence(FAST) code.Influence rules of wind load and wave load on the characteristics of 6 MW spar-type FOWT are investigated.Firstly,validation of the model is carried out and a satisfactory result is obtained.The maximal deviations of rotor thrust and power between simulation results and reference values are 4.54% and-2.74%,respectively.Then the characteristics,including rotor thrust,rotor power,out-of-plane blade deflection,tower base fore-aft bending moment,and mooring line tension,are researched.The results illustrate that the mean value of dynamic response characteristics is mainly controlled by the wind-induced action.For characteristics of tower base fore-aft bending moment and platform pitch motion,the oscillation is dominated by the wave-induced action during all conditions considered.For characteristics of out-of-plane blade tip deflection and mooring line tension,the oscillation is commanded by combination effect of wave and wind loads when the wind speed is lower than the rated wind speed(hereinafter referred to as below rated wind speed) and is controlled by the wave-induced action when the wind speed is higher than the rated wind speed(hereinafter referred to as above rated wind speed).As to the rotor thrust and power,the oscillation is dominated by the wind induced action at below rated wind speed and by the combination action of wind and wave loads at above rated wind speed.The results should be useful to the detailed design and model basin test of the 6 MW spar-type FOWT.     

乘用车产品竞争力评价方法探析

初步建立了乘用车产品竞争力概念模型和数学评价模型,并提出了评价的具体程序与方法。