基于UG、ANSYS和ADAMS的联合仿真研究

论述了三维实体建模软件UG、有限元分析软件ANSYS和机械系统多体动力学分析软件ADAMS联合仿真的实现方法;以曲柄连杆机构的刚柔耦合模型的动力学分析为例,验证了联合仿真方法的可行性及效果。     

A Crank-Nicolson Difference Scheme for Generalized Rosenau Equation

Much effort has been devoted to researching the common Rosenau equation,but the numerical method of it has not been studied.In this paper,a conservative Crank-Nicolson difference scheme for an initial-boundary value problem of the generalized Rosenau equation is proposed.Existence and uniqueness of numerical solutions are derived.By method of discrete energy,the second order convergence and stability are discussed.Numerical examples demonstrate the theoretical results.     

A method to calculate and counterbalance the inertia force of slider-crank mechanisms in high-speed presses

A new method to calculate and counterbalance the inertia force of slider-crank mechanisms in high-speed mechanical presses was put forward. By analyzing the kinematic characteristics of a center-located slider-crank mechanism whose crank rotates at a constant angular velocity, the kinematic parameters of the slide, connecting rod and crank were formulated approximately. On the basis of the results above, three inertia forces and the input moment in the mechanism during its idle running were investigated and formulated by dynamic analysis. A verification experiment was performed on a slider-crank mechanism at a high-speed press machine. The forces derived from the established formulas were compared respectively with those obtained by the ADAMS software and the classical method of connecting rod mass substitution. It was experimentally found that the proposed formulas have an improved performance over related earlier techniques. By use of these results, a 1000 kN 1250 rpm four-point high-speed press machine was designed and manufactured. The slide of this press is driven by four sets of slider-crank mechanisms with symmetrical layout and opposite rotation directions to counterbalance the horizontal inertia forces. Four eccentric counterbalance blocks were designed to counterbalance the vertical force after their mass and equivalent eccentric radius were formulated. The high-speed press machine designed by the proposed counterbalance method has worked with satisfactory performance and good dynamic balance for more than four years in practical production.     

具有匀速往复运动和急回特性的非圆齿轮-曲柄滑块机构的设计

非圆齿轮与曲柄滑块机构组合可以得到具有匀速往复运动和急回特性的滑块运动,有很大的实用价值。该文介绍了这类机构的设计方法。     

曲柄箱油雾浓度监视装置故障分析

通过对某轮ＧＲＡＶＩＮＥＲＭＫ－４型曲柄箱油雾浓度监视装置经常发生误报警这一三番五次２现象，从理论上分析其故障原因，并阐述了故障的处理方法，最后从管理的角度提出几点建议。     

曲柄箱爆炸及预防措施

分析了柴油机曲柄箱产生爆炸的原因，从技术及轮机管理两方面探讨了防止爆炸的措施，对柴油机曲柄箱防爆门和油雾探测器的工作原理及发展状况进行了总结分析，阐述了轮机人员实船管理中为防止爆炸应遵循的基本原则。     

具有奖速往复运动和急回特性的非圆齿轮——曲柄滑块机构的设计

非圆齿轮与曲柄滑块机构组合可以得到具有匀速往复运动和急回特性滑块运动，有很大的实用价值，该文介绍了这类机构的设计方法 。     

关于某曲柄滑块多杆机构去除虚约束后的各种形式

1 研究前提1.1 研究对象 本文以类似图1所示曲柄滑块多杆机构为研究对象,专题研究该机构的虚约束及去除虚约束后的各种形式。1.2 本文特定的定义 两转副件——两端联接两个转动副的单个构件。 两转副件长度—两转副件上的两个转动副中心之间距离。1.3 已知条件 图1所示曲柄滑块多杆机构中,有关两转副件的长度、机架及其滑块对应的尺寸应满足下列各式: