【虎門科技】WEBINAR：開發能源電力系統所需之物理性模擬解決方案

【Physics-Based Simulation Solutions for Power Electronic System Development】

日期：August, 15 2017
時間：11:00 AM (Eastern Time Zone)

Description:

Physics-based simulation is indispensable in the development of power electronic systems that helps companies reduce development costs, optimize energy efficiency, increase reliability and comply with standards for EMC and safety. ANSYS provides an extensive and highly integrated set of solutions for modeling and analyzing power electronics, from 3-D physics simulation of critical components to multi-level system simulation of low/medium/high voltage drives, inverters, converters, controls and protection equipment. ANSYS Simplorer uniquely integrates detailed 3-D electromagnetic, electrical and thermal simulations with highly accurate semiconductor devices and VHDL-AMS and Spice components to create power electronic system models that can be virtually tested to analyze and optimize performance. Join us for this webinar to learn how ANSYS Simplorer is used in power electronic systems development workflows to simulate and optimize power losses and system efficiency, mitigate EMC problems, understand thermal performance, integrate controls, and inject and assess faults.

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【兆山辰】新品上市- CH防振基座

輕量化‧高機能

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【皮托科技】COMSOL NEWS 2017 - SPECIAL EDITION ACOUSTICS

此期COMSOL News特別表揚聲學領域中設計師，工程師和研究人員的成果。
讀者將了解他們如何在緊迫期限和不同客戶需求下利用COMSOL Multiphysics軟體開發出創新產品。此外，讀者也將了解當今模擬專家如何通過使用APP模擬器和COMSOL Server分享器將多物理模擬成果與同事和客戶分享。

Topics include:

▲Acoustics simulation
▲Virtual product development
▲High-precision microphones
▲Combustion instability
▲NVH performance
▲Transformer hum
▲Multibody-acoustics interaction
▲Acoustic cloaking
▲Infrasound-induced vibrations
▲Feedback reduction
▲Noninvasive acoustic technology
▲High-precision transducers
▲Guest editorial on computational acoustics

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《振動噪音科普專欄》如何求得彈簧的彈簧常數？

如何求得彈簧的彈簧常數？

彈簧重要的一個特性參數就是彈簧常數(spring constant)，在SI制單位為N/m。本文將介紹以振動的理念來估算彈簧的彈簧常數。

在物理實驗中，多以拉力計對彈簧作拉伸，同時記錄不同拉力時，所對應的位移，由記錄所施加的「拉力」除以彈簧的「位移」，就可以推算得到彈簧的彈簧常數。

如果以振動的方式，是也可以求得彈簧的彈簧常數，那要如何做呢？

取一個質塊吊在彈簧下方，將質塊往下拉，再釋放質塊，質塊就會來回的振動，參考影片中介紹的步驟，就可以求得彈簧的彈簧常數，說明如下：

1.         量測質塊的質量(kg)，m

2.         量測質塊來回振動的一個週期時間(sec)，Tn

3.         推算質塊彈簧系統的自然頻率(Hz)，fn

4.         估算彈簧常數(N/m)，k=m*(2*π*fn)^2

在引用上述的步驟，要注意所採計的單位。有興趣的讀者可以參照影片的說明，嘗試求得彈簧的彈簧常數。

本文介紹以振動的方式求得彈簧的彈簧常數，希望對您有幫助。

以上個人看法，請多指教！

王栢村

2017.06.23

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