本文關鍵詞：加載卸載磁頭抗沖擊特性分析及實驗研究　出處：《哈爾濱工業(yè)大學》2012年碩士論文　論文類型：學位論文

  更多相關文章： 磁頭磁盤界面 跌落沖擊 數(shù)值仿真 有限元 碰撞

【摘要】：隨著電子信息的發(fā)展，電子產(chǎn)品越來越智能化、多功能化，電子產(chǎn)品的存儲設備也朝著微型化、高存儲容量的方向發(fā)展。作為電子產(chǎn)品存儲設備的典型代表的微硬盤的發(fā)展也越來越受關注，特別是存儲密度與抗跌落沖擊特性等方面成為國內(nèi)外學者重要的研究方向。為了迎合市場需求，硬盤的存儲密度飛速增加，最新資料表明硬盤采用新存儲技術(shù)HAMR的磁頭，其理論存儲密度可以達到5-10Tbit/in2，如此高的存儲密度將使硬盤的磁頭磁盤間距進一步減小，這將對硬盤內(nèi)部的頭盤界面抗沖擊特性提出巨大的挑戰(zhàn)。 為了提高微硬盤內(nèi)部的頭盤界面抗跌落沖擊特性，本文主要對頭盤界面的跌落沖擊響應進行研究。本文首先根據(jù)微硬盤驅(qū)動器的工作原理，對受到跌落撞擊的頭盤界面建立動力學模型，建立頭盤系統(tǒng)運動微分方程，通過數(shù)值仿真方法對頭盤界面的碰撞響應進行理論研究，得出硬盤驅(qū)動器頭盤碰撞時的碰撞曲線。 為了更全面地對微硬盤跌落沖擊響應進行正確預測，首先應用ANSYS/LS-DYNA有限元動力仿真軟件建立完整的微硬盤有限元模型，然后通過施加不同的沖擊載荷對微硬盤有限元模型進行LS-DYNA動力仿真，分析不同的沖擊幅值、脈沖寬度、跌落方式等對硬盤的磁盤片振動、頭盤碰撞、磁頭磁盤接觸力以及摩擦力的影響。 接著以沖擊實驗臺為基礎，對微硬盤樣件進行激光切割使符合實驗要求。設計加工微硬盤的夾具，，建立跌落沖擊系統(tǒng)實驗臺，對微硬盤做跌落沖擊實驗，利用激光多普勒振動測試儀(LDV)測出微硬盤受到跌落沖擊作用時的頭盤界面的動態(tài)響應。最后對微硬盤跌落沖擊實驗所得的數(shù)據(jù)進行對比分析，解釋實驗現(xiàn)象，總結(jié)微硬盤跌落沖擊動態(tài)響應特性。
[Abstract]:With the development of electronic information, electronic products are becoming more and more intelligent and multi-functional, and the storage devices of electronic products are becoming more and more miniaturized. The development of high storage capacity. As a typical representative of electronic storage devices, the development of micro-hard disk has attracted more and more attention. Especially, storage density and anti-drop impact characteristics have become an important research direction of scholars at home and abroad. In order to meet the market demand, storage density of hard disk increases rapidly. The latest data show that the theoretical storage density of the magnetic head of HAMR, a new storage technology, can reach 5-10Tbit / in2. Such a high storage density will further reduce the gap between the head disks of the hard disk, which will pose a great challenge to the impact resistance of the head disk interface inside the hard disk. In order to improve the anti-drop impact characteristics of the head disk interface inside the micro hard disk, this paper mainly studies the drop impact response of the head disk interface. Firstly, according to the working principle of the micro hard disk drive. The dynamic model of the head disk interface was established and the differential equation of motion of the head disk system was established. The collision response of the head disk interface was studied by numerical simulation method. The collision curve of head disk of hard disk drive is obtained. In order to predict the drop impact response of micro hard disk more comprehensively, a complete finite element model of micro hard disk is established by using ANSYS/LS-DYNA finite element dynamic simulation software. Then the finite element model of the micro hard disk is simulated by LS-DYNA dynamic simulation with different impact loads, and the vibration of the disk is analyzed with different impact amplitude, pulse width, drop mode and so on. Head disk collision, magnetic head disk contact force and friction effect. Then on the basis of the impact test bench, laser cutting the samples of the micro hard disk to meet the requirements of the experiment. Design the fixture to process the micro hard disk, establish the drop impact system test bench, and do the drop impact experiment on the micro hard disk. The dynamic response of the head disk interface was measured by laser Doppler vibration tester (LDV). Finally, the data obtained from the drop impact test of the micro hard disk were compared and analyzed. To explain the experimental phenomena and summarize the dynamic response characteristics of microdisk drop impact.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TP333.35

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