1) drop/impact
跌落/冲击
2) drop impact
跌落冲击
1.
A 3-D FE model was established in order to investigate dynamic responses of the round PCB and find the weakness of solder joint in packaging under drop impact.
针对JEDEC标准板的局限性,设计一种圆形PCB,建立其三维有限元模型,运用ABAQUS有限元分析软件对设计板在跌落冲击载荷下的动态特性进行模拟仿真,找到封装中焊点的薄弱环节,得出焊点的应力状况与PCB板的挠曲变形存在一致的对应关系,验证PCB板在跌落冲击过程中弯曲振动导致的交变应力是焊点破坏的原因。
2.
With increase in electronic package density,the reliability of a board-level package under drop impact load becomes a key issue.
随着微电子封装密度的提高,板级封装在跌落冲击载荷下的可靠性成为人们关注的焦点。
3.
Drop direction is an important parameter of drop impact,this paper presented a new method to measure drop direction and introduced the basic structure,measurement circuit and principle of the sensor.
跌落方位是跌落冲击中的一个重要参数,测量较为困难,提出了一种基于电容传感器的跌落方位现场测试新方案,分析了其基本结构、测量电路、测试原理和方法。
3) dropping impact
跌落冲击
1.
A non-linear parameter is modeled by experiment applying NLAR method through displacement,which comes from acceleration of the dropping shock to EPE by integral,and the exactitude of the model is verified by applying the numerical method,the results show that the model depicts the dynamic course of extruded polyethylene(EPE) dropping impact exactly.
通过对发泡聚乙烯在跌落冲击中的加速度响应信号进行数值积分,得到位移响应信号,应用非线性自回归法进行非线性参数建模,并运用数值求解法进行验证,结果表明,该模型能较好地描述发泡聚乙烯型缓冲系统的跌落冲击动态过程。
2.
The major mechanical damages of fruit are usually not direct split but local bruise caused by dropping impact during harvesting, sorting, packaging, and transportation.
对于果实产品,通常其作业、运输过程中的主要机械破坏形式为跌落冲击引起的产品局部损伤,而非直接发生破裂。
3.
For the viscoelastic products such as fruits,the major mechanical damages usually are not direct split but local bruise caused by dropping impact during distribution,packaging and transportation.
提出了跌落损伤脆值与跌落损伤边界的新概念,并提出了测定获取跌落冲击损伤脆值与跌落损伤边界曲线的技术过程与方法。
4) dropping shock
跌落冲击
1.
Research on the Dropping Shock Response of Linear System;
线性系统的跌落冲击解研究
2.
The Effect of Damping on Dropping Shock of Nonlinear Cushioning System;
阻尼对非线性缓冲包装系统跌落冲击的影响
3.
The component and operational principle of computer aided testing system for dropping shock were introduced.
介绍了跌落冲击测试系统的组成和原理,基于跌落冲击试验的共性,研究了跌落冲击试验数据处理方法,在采用卡尔曼滤波对采集数据进行处理的基础上,提出冲击过程曲线的B样条拟合方法以及基于拟合曲线的最大加速度值和速度变化量的求解算法。
5) Drop Shock Machine
跌落冲击机
1.
Effects of HardNonlinear Cushion for Drop Shock Machineto Simulation of HalfSine Waveform;
跌落冲击机垫层的硬非线性对半正弦波模拟的影响
6) Drop impact test
冲击跌落试验
补充资料：标准操作冲击电压波形(见冲击电压发生器)
标准操作冲击电压波形(见冲击电压发生器)
standard switching impulse voltage waveform
b .oozhun CooZuo ChongJld，onyo boxlng标准操作冲击电压波形(standard switchingimpulse voltage waveform)见冲击电压发生器。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条