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When train bridge can cause the bridge vibration, the bridge vibration in turn also can affect the vehicles the vibration, namely forms the vehicle bridge coupled oscillation question.

列车过桥时会引起桥梁的振动,桥梁的振动反过来也会影响车辆的振动,即形成车桥耦合振动问题。

Based on the dynamics fundamental equation, the rigid ships rolling coupled oscillation model was established, then the definite condition of the coupled oscillation equation under the regular transverse wave and first-order ordinary differential equations were presented. The ship vibration rule under the regular transverse wave was analyzed by examples, simultaneously the influence of damping coefficient on the vibration type was discussed.

基于动力学基本方程,首先建立了刚性船舶横摇的耦合振动方程,然后给出了在规则横浪激励下的耦合振动方程的定解条件和一阶常微分方程组,最后通过算例计算了在规则横浪作用下船舶的振动规律,同时研究了阻尼系数等参数对其振动规律的影响情况。

Triggering off the free oscillation of the reinforced bar by amplifying the triggering signal of the piezoelectric ceramic sensor by the emitter coupled oscillation circuit , we have measured the oscillation frequency of various reinforced bars, and then we can calculate the magnitude of the corresponding pre stressing force accor.

论述了振动法测量钢筋的预应力的新方法,振动触及压电陶瓷传感器产生的电信号,通过双稳态触发振荡电路,经放大后启动钢筋自由振动。根据弦线振动频率和所受张力之间的关系,测量出不同型号不同长度的各类钢筋的频率,从而得出对应钢筋的预应

The motion of a type of nonlinear damped oscillation is analyzed to resort the method of numerical analysis, and compared it with the motion of the linear damped oscillation.

摘要用数值分析方法分析一类非线性阻尼振动问题,与线性阻尼振动进行比较,得到非线性阻尼振动状态每次过θ=0位置的时刻稍后于线性阻尼振动状态。

The motion of a type of nonlinear damped oscillation is analyzed to resort the method of numerical analysis,and compared it with the motion of the linear damped oscillation.

用数值分析方法分析一类非线性阻尼振动问题,与线性阻尼振动进行比较,得到非线性阻尼振动状态每次过θ=0位置的时刻稍后于线性阻尼振动状态。

In this part, the characteristics of transient responses of flexible rotor systems with arbitrarily distributed mass on isotropic or anisotropic supports passing through several critical speeds seguencially are examined. Here, the current knowledge of rotor dynamics on the eigenproblem of damped free whirling vibration, the generaliged damped mode theary, the transient forced vibration and so on combined with KBM asymptotic method in the nonlinear vibration theory is employed and extended.

作者综合运用并引伸推广转子动力学关于阻尼自由回旋振动的特征问题、广义阻尼模态理论、瞬态强廹振动等現代理论和方法,结合非线性振动理论中的KBM渐近法,提出自己独創見解和覌点,成功地建立起正回旋和逆回旋两种情况下转子通过临界点的瞬态振动一阶微分方程组,可以在临界点的邻域内从事方程的数值积分计算。

In this paper,the Raman spectrum were used to study sapphire,dichroite,aquamarinl,topaz and kyanite,it is found that the characteristic Raman translocations of sapphire which are caused by Al-O vibration are 413cm-1,640cm-1 and 668cm-1,the characteristic Raman translocations of dichroite which are caused by Si-O vibration are 550cm-1,662cm-1,964cm-1and 1176cm-1,the characteris.

本文通过对蓝宝石、堇青石、蓝色托帕石、海蓝宝石和蓝晶石的拉曼光谱进行测试与研究,得到蓝宝石具有由Al-O振动引起的特征拉曼位移413cm-1,640cm-1和668cm-1;堇青石具有由Si-O振动引起的特征拉曼位移550cm-1,662cm-1,964cm-1和1176cm-1;海蓝宝石具有由Si-O振动引起的特征拉曼位移678cm-1,1064cm-1,1232cm-1;蓝色托帕石具有由Si-O振动引起的特征拉曼位移844cm-1和924cm-1;蓝晶石具有由Si-O引起的特征拉曼位移933cm-1和1133cm-1。

Measure the result as follows: Ra(Surface roughness of steel ball)=0.015 u m, wavmess=0.06 um,△Sph=0.010 u m, VDWL=0.015 u m. The flocculus steel balls measured were assembled in Luoyang Precise Bearings Company. The results show that the bearing vibration values reached Z2 group near 98%, the bearing vibration values with new technique balls tower above sixty percentile than grindtechnics.

然后对加工出的"绒面"钢球在洛阳轴承集团进行了合套测振试验,测振试验结果表明:振动值达到Z2组的比例达到98%,比用研磨工艺制得的钢球合套后测得的振动值数据高出60个百分点;振动值达到Z3组的比例高达到83~97%,比用研磨工艺制得的钢球合套后测得的振动值数据高出77~90个百分点。

Vibration into free vibration, vibration and forced vibration damping.

振动分为自由振动、阻尼振动和受迫振动

Basing on the dynamic analysis of the forced vibration of the block, the extent and level of the vibration are investigated.

对激振力激励下的机体强迫振动响应进行了动态分析,考察机体在激振力的作用下的振动情况、振动评级,并联系穴蚀对气缸套外表面振动加速度进行评价。

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If you have any questions, you can contact me anytime.

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