forced vibration

简明释义

受迫振动

英英释义

例句

1.In mechanical systems, forced vibration is often used to test the durability of components.

在机械系统中，强迫振动通常用于测试组件的耐久性。

2.The research focused on how forced vibration affects material fatigue over time.

研究集中在强迫振动如何影响材料疲劳的时间上。

3.The engineers studied the effects of forced vibration on the bridge's structural integrity.

工程师们研究了强迫振动对桥梁结构完整性的影响。

4.The forced vibration of the machine caused unusual noise levels in the factory.

机器的强迫振动导致工厂内出现异常噪音水平。

5.To simulate real-world conditions, we applied forced vibration to the prototype.

为了模拟真实世界的条件，我们对原型施加了强迫振动。

作文

In the realm of physics and engineering, the concept of forced vibration is pivotal for understanding how structures respond to external forces. Forced vibration refers to the oscillation of an object or system that occurs when it is subjected to a periodic external force. This phenomenon can be observed in various applications, from musical instruments to civil engineering structures such as bridges and buildings. To grasp the significance of forced vibration, we must explore its causes, effects, and practical implications.The primary cause of forced vibration is an external force that acts on a system. For instance, when a musician plucks a guitar string, the string vibrates due to the force applied to it. This vibration is not inherent to the string itself but is induced by the external action of the musician. Similarly, in civil engineering, wind or seismic activity can induce forced vibration in skyscrapers and bridges. Understanding these forces is crucial for engineers to design structures that can withstand such vibrations without failing.One of the most important aspects of forced vibration is its relationship with resonance. Resonance occurs when the frequency of the external force matches the natural frequency of the system. When this happens, the amplitude of the vibrations can increase significantly, potentially leading to catastrophic failures. A famous example of this is the Tacoma Narrows Bridge, which collapsed in 1940 due to aeroelastic flutter, a type of forced vibration. This disaster highlighted the importance of accounting for forced vibration in engineering design.In practical terms, engineers often use various methods to mitigate the effects of forced vibration. Damping systems, for instance, are employed to absorb and dissipate energy from vibrations, reducing their impact on structures. These systems can be passive, like rubber bearings, or active, involving sensors and actuators to counteract vibrations in real time. By incorporating such technologies, engineers can enhance the safety and longevity of structures subjected to forced vibration.Moreover, forced vibration is not limited to large structures; it also plays a critical role in mechanical systems. In machinery, components such as gears and motors can induce vibrations that affect performance and lifespan. Engineers must analyze these vibrations to ensure that machines operate efficiently and reliably. Techniques such as vibration analysis and modal testing are commonly used to identify and address issues related to forced vibration in mechanical systems.In conclusion, the study of forced vibration is essential across various fields, from music to engineering. Understanding how external forces induce vibrations allows us to design safer structures and more efficient machines. As technology advances, the methods for analyzing and mitigating forced vibration will continue to evolve, ensuring that we can manage this complex phenomenon effectively. By appreciating the principles behind forced vibration, we can better navigate the challenges it presents in our increasingly dynamic world.

在物理和工程领域，强迫振动的概念对于理解结构如何响应外部力至关重要。强迫振动是指当一个物体或系统受到周期性外部力作用时所发生的振荡现象。这种现象可以在各种应用中观察到，从乐器到土木工程结构，如桥梁和建筑物。为了掌握强迫振动的重要性，我们必须探讨其原因、影响和实际意义。强迫振动的主要原因是作用于系统的外部力。例如，当音乐家拨动吉他弦时，弦因施加在其上的力而振动。这种振动不是弦本身固有的，而是由音乐家的外部动作诱导的。类似地，在土木工程中，风或地震活动可以在摩天大楼和桥梁中引发强迫振动。理解这些力对于工程师设计能够承受这种振动而不失败的结构至关重要。强迫振动最重要的方面之一是它与共振的关系。当外部力的频率与系统的自然频率匹配时，就会发生共振。在这种情况下，振动的幅度可能会显著增加，导致灾难性的失败。一个著名的例子是1940年塔科马海峡大桥的倒塌，该事件是由于气动弹性颤振引起的，这是一种强迫振动。这一灾难突显了在工程设计中考虑强迫振动的重要性。在实际操作中，工程师通常使用各种方法来减轻强迫振动的影响。例如，阻尼系统被用来吸收和耗散来自振动的能量，从而减少其对结构的影响。这些系统可以是被动的，比如橡胶支座，或是主动的，涉及传感器和执行器实时抵消振动。通过引入这些技术，工程师可以提高在强迫振动作用下结构的安全性和耐久性。此外，强迫振动不仅限于大型结构；它在机械系统中也发挥着关键作用。在机械设备中，齿轮和电机等部件可能会引发影响性能和寿命的振动。工程师必须分析这些振动，以确保机器高效可靠地运行。振动分析和模态测试等技术通常用于识别和解决与机械系统中的强迫振动相关的问题。总之，研究强迫振动在各个领域都是至关重要的，从音乐到工程。了解外部力量如何引发振动使我们能够设计出更安全的结构和更高效的机器。随着技术的进步，分析和减轻强迫振动的方法将继续发展，确保我们能够有效管理这一复杂现象。通过理解强迫振动背后的原理，我们可以更好地应对在日益动态的世界中所带来的挑战。