揺らすスクリプトです。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Shaker : MonoBehaviour
{
public bool Enabled;//揺らすか
public AnimationCurve m_ShakeCurve = AnimationCurve.Linear(0, 1, 1, 0);//揺らす強さを時間で調整する。
public Vector3 m_ShakeValue = new Vector3(0.1f, 0.1f, 0.1f);//揺らす大きさ
Transform m_Transform;//揺らす物のトランスフォーム
Vector3 m_TargetPos;//この位置を基準に揺らす
public int m_Interval = 2;//揺らす間隔(フレーム)
int m_IntervalCounter;
public float m_Time = 0.5f;//揺らす時間
float m_CurrentTime;//0から1
float m_AddTime;
Vector3 m_RandomPos;

private void Awake()
{
m_Transform = transform;
m_TargetPos = m_Transform.position;
m_AddTime = Time.fixedDeltaTime / m_Time;
}

void FixedUpdate()
{
if (!Enabled) return;

if (m_IntervalCounter == m_Interval)
{
m_RandomPos.x = Random.Range(-m_ShakeValue.x, m_ShakeValue.x);
m_RandomPos.y = Random.Range(-m_ShakeValue.y, m_ShakeValue.y);
m_RandomPos.z = Random.Range(-m_ShakeValue.z, m_ShakeValue.z);
m_Transform.position = m_TargetPos + m_RandomPos * m_ShakeCurve.Evaluate(m_CurrentTime);
m_IntervalCounter = 0;
}
else
{
m_IntervalCounter++;
}

m_CurrentTime += m_AddTime;
if (m_CurrentTime >= 1.0f)
{
Enabled = false;
m_Transform.position = m_TargetPos;
}
}

public void Shake()//揺らす時はこれを呼んでください。
{
Enabled = true;
m_CurrentTime = 0.0f;
}
}