使用 FKM 指南评估旋转载荷下弹性联轴器的疲劳强度
技术
- 分析与建模 - 数字孪生/模拟
- 传感器 - 触觉传感器
适用行业
- 设备与机械
- 金属
适用功能
- 物流运输
- 采购
用例
- 制造过程模拟
- 虚拟现实
关于客户
本案例研究中的客户是 Süddeutsche Gelenkscheibenfabrik GmbH & Co. KG (SGF)，这是一家专门生产弹性联轴器的德国公司。这些联轴器用于多种行业，包括汽车、电力和制造。 SGF的弹性联轴器旨在减少振动并补偿轴不对中，同时提高整机的疲劳强度。然而，由于这些联轴器金属部件的非线性特性和径向载荷的大循环次数，该公司在评估这些联轴器金属部件的疲劳强度时面临着挑战。
挑战
弹性联轴器经常用于汽车、电力和制造等行业，由于其非线性特性、相对旋转和径向载荷的大循环次数，提出了独特的挑战。这些特性不允许使用载荷叠加原理，这意味着必须单独考虑每种可能的载荷组合（轴向力、径向力和扭转扭矩）。这会导致大量的载荷工况，从而导致大量的强度评估。对单个单位载荷产生的叠加应力状态进行简单评估会导致错误结果，可能会显示比实际情况更高的部件强度，从而导致零件失效。因此，必须模拟所有载荷组合，并随后根据疲劳强度进行相应评估。
解决方案
解决这一挑战的方法包括三步法。首先，通过对每种可能的载荷组合进行多体仿真，确定因联轴器上的载荷而施加到金属法兰上的实际力和扭矩。然后，在第二步中将这些力和扭矩转移到 FEM 分析，以确定每个载荷组合的应力状态。第三步，确定适当的载荷组合，并使用 S-Life FKM 根据 FKM 指南进行静态和疲劳强度评估。由于简单的表格驱动载荷定义，MSC Marc FEM 软件用于执行 FEM 分析。通过这种方法，所有可能的载荷组合都被编译在表格中，每个力和扭矩方向分别对应一个表格。因此，所有可能的载荷组合均通过使用此类表格的单个 FEM 载荷工况进行模拟。力和扭矩从 MBS 软件到 MSC Marc 的传输是在脚本的帮助下完成的，从而使强度评估的前两个步骤变得非常简单和快速。
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